MJML App Gallery sphero-mini shows nesting error of miml component

[DanielOberlechner]

Describe the bug
See title | not sure if this mjml problem or mjml-app problem, tried first here...

To Reproduce
Steps to reproduce the behavior:
I downloaded the miml app for macOS.
Went to the Gallery and searched for a pre-made template.
Found the template sphero-mini and opened it:
Got greeted by a linting error from the app that mj-spacer cannot be used inside mj-body.

Expected behavior
No error's should be shown on a pre-made template.

Screenshots

Environment (please complete the following information):

• OS: macOS 12.3 Beta
• App Version newest from Github

[DanielOberlechner]

Have seen now bugs in other templates as well.
Attribute vertical-align is illegal
Attributes color, font-family are illegal ...
(in the happy new year theme email)

[iRyusa]

Well some templates comes from community so they're not really "linted" properly sometimes. It happens, at least the editor told you so :D
And for some, they come from older version of MJML (some where directly taken from Mailjet before MJML was a thing yet) so they're not sanitized