Comment # 1 on bug 1133036 from Dead Mozay

(In reply to T Adams from comment #0)
> Cinnamon-settings won't open in Cinnamon version 3.8.9.  I had to fix the
> problem by following FrancoARossi's advice in this github thread:
> 
> https://github.com/linuxmint/cinnamon/issues/8495
> 
> and editing /usr/share/cinnamon/cinnamon-settings/bin/imtools.py as per his
> suggestions.
> 
> I believe that this problem has been fixed in more recent Cinnamon versions.
> The version 3.8 in Tumbleweed is now about a year old.

fix will only enter 4.0.10, not yet released