This is probably similar to the DarkTable post. But a bit of digging into other bug reports it seems GTK2 is depracated superceded by GTK3. I wonder if this has been captured in the 1.4.1 AppImage I’m using?
I forgot to add this error only occurs when running the GraxPert-AI.py script v2.0.3
Yes it has. You can ignore that warning message