just tried to load up my most recent save and was met with this -
'Expression Error Unable to find object " @@@@@@@@@@@@@@@@@@# m Gals__Upgradef " in script Gals__Upgrade_Initialise.'

so I presume it's something to do with GCD?? my warnings.txt contains just this.

I get that occasionally. Still not quite sure what causes it, but moving GCD down in my load order always seems to fix it, and it's never caused me any problems in the actual save file.