AssertionError

[thundercat71]

After drawing a box for say Grounding instruction: cat;
I will get a white background with a red box labeled cat in Parsed Sketch Pad.

I will also get an error of:
Error running process: C:\SD\stable-diffusion-webui\extensions\sd_webui_gligen\scripts\gligen_ui.py07<00:00, 2.75it/s]
Traceback (most recent call last):
File "C:\SD\stable-diffusion-webui\modules\scripts.py", line 417, in process
script.process(p, *script_args)
File "C:\SD\stable-diffusion-webui\extensions\sd_webui_gligen\scripts\gligen_ui.py", line 416, in process
assert len(boxes) == len(grounding_texts)

Can any advise?