Hello guys , I am trying to use it in Django 4.0.6 but I have the below issue , in Django 3.2.4 is working fine.

[RamVic]

Internal Server Error: /calculadora
Traceback (most recent call last):
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/core/handlers/base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/ramirosv/ramsys1/webpage/dashboard/monitoreo/vista1.py", line 146, in calcu
return render (request,'calculadora.html',{'comodin' : comodin,'comodin2':comodin2,'info':ips,'tabla': tabla,'infoip':infoip})
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/shortcuts.py", line 24, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/loader.py", line 62, in render_to_string
return template.render(context, request)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/backends/django.py", line 62, in render
return self.template.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 167, in _render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/defaulttags.py", line 322, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'str' object has no attribute 'render_annotated'

After to do the test.

ERROR: test_for_tag_multi (multiforloop.tests.TagTests)

Traceback (most recent call last):
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 21, in test_for_tag_multi
self.tag_test(template, context, output)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 16, in tag_test
self.assertEqual(t.render(Context(context)), output)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'SafeString' object has no attribute 'render_annotated'

======================================================================
ERROR: test_for_tag_multi_longest (multiforloop.tests.TagTests)

Traceback (most recent call last):
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 36, in test_for_tag_multi_longest
self.tag_test(template, context, output)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 16, in tag_test
self.assertEqual(t.render(Context(context)), output)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'SafeString' object has no attribute 'render_annotated'

======================================================================
ERROR: test_for_tag_multi_longest_empty (multiforloop.tests.TagTests)

Traceback (most recent call last):
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 42, in test_for_tag_multi_longest_empty
self.tag_test(template, context, output)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 16, in tag_test
self.assertEqual(t.render(Context(context)), output)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'SafeString' object has no attribute 'render_annotated'

======================================================================
ERROR: test_for_tag_multi_longest_null (multiforloop.tests.TagTests)

Traceback (most recent call last):
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 48, in test_for_tag_multi_longest_null
self.tag_test(template, context, output)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 16, in tag_test
self.assertEqual(t.render(Context(context)), output)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'SafeString' object has no attribute 'render_annotated'

======================================================================
ERROR: test_for_tag_multi_reversed (multiforloop.tests.TagTests)

Traceback (most recent call last):
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 30, in test_for_tag_multi_reversed
self.tag_test("{% for x in x_list reversed; y in y_list %}{{ x }}:{{ y }}/{% endfor %}", {"x_list": ('x1', 'x2', 'x3'), "y_list": ('y1', 'y2', 'y3')}, u"x3:y1/x2:y2/x1:y3/")
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 16, in tag_test
self.assertEqual(t.render(Context(context)), output)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'SafeString' object has no attribute 'render_annotated'

======================================================================
ERROR: test_for_tag_multi_truncate (multiforloop.tests.TagTests)

Traceback (most recent call last):
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 27, in test_for_tag_multi_truncate
self.tag_test("{% for x in x_list; y in y_list %}{{ x }}:{{ y }}/{% endfor %}", {"x_list": ('one', 1, 'carrot'), "y_list":('two', 2)}, u"one:two/1:2/")
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 16, in tag_test
self.assertEqual(t.render(Context(context)), output)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'SafeString' object has no attribute 'render_annotated'

======================================================================
ERROR: test_for_tag_multi_unpack (multiforloop.tests.TagTests)

Traceback (most recent call last):
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 24, in test_for_tag_multi_unpack
self.tag_test("{% for x in x_list; y,z in yz_list %}{{ x }}:{{ y }}, {{ z }}/{% endfor %}", {"x_list": ('x1', 'x2', 'x3'), "yz_list": (('y1', 'z1'), ('y2', 'z2'), ('y3', 'z3'))}, u"x1:y1, z1/x2:y2, z2/x3:y3, z3/")
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/tests.py", line 16, in tag_test
self.assertEqual(t.render(Context(context)), output)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 958, in render_annotated
return self.render(context)
File "/home/ramirosv/ramsys1/lib/python3.8/site-packages/multiforloop/templatetags/multifor.py", line 118, in render
return nodelist.render(context)
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "/home/ramirosv/.local/lib/python3.8/site-packages/django/template/base.py", line 1000, in
return SafeString("".join([node.render_annotated(context) for node in self]))
AttributeError: 'SafeString' object has no attribute 'render_annotated'

---

Ran 7 tests in 0.012s

FAILED (errors=7)
Destroying test database for alias 'default'...

[gabrielgrant]

Hey, thanks for the bug report. It's not immediately obvious to me what's breaking here. Did you ever figure this out?

[0phiTeS]

I managed to solve it by replacing this code in django.templates.base:
`class NodeList(list):

def render(self, context):
    return SafeString("".join([node.render_annotated(context) for node in self]))`

with this:
`class NodeList(list):

def render(self, context):
    return SafeString("".join([node.render_annotated(context) if isinstance(node,Node) else node for node in self]))`

I am sure there has to be some other way, without messing with the django installation