Error in tool_offsetview.py

I am using version Python 3.7.3

The problem is in gcode_editor.py . In the version from Sep 15, 2022 it still works fine, in newer versions there is already a problem. It seems to me that comments in gcode should be accepted in every language of the world.
 

Yes I was hoping it was related to python version. I test with a newer version then you.
3.8.10.
I'm still not sure why you have a problem but I do not.

could you try changing the line 110 to :

source = source.decode("utf-8", "ignore")

see if that helps?

Yes, when added to line 110 "ignore" , it works without error.
Maybe it's actually a python version problem if you're using 3.8.10

could be in new versions 'ignore' is default. Thanks for testing I'll push that fix to 2.9