I am attempting to group together a room. When doing so, I receive a popup error:
This seems to only happen with one specific model group of parts and there is nothing special about it except a few constraints.
It links to a devforum post about LoadLibrary being deprecated on December 4th, but that doesn’t give me any information.
https://devforum.roblox.com/t/loadlibrary-is-going-to-be-removed-on-december-4th for details
Any help or updates on this would be appreciated.
Try deactivating your plugins and trying again. Judging by the error message’s traceback, it looks like the error is coming from the F3X plugin. (cc @GigsD4X)
Disabling the plugin does not seem to fix the problem.
Have you tried restarting studio after disabling it? If so, do you still get the same error popup?
Update for fixing that warning should come out later tonight or tomorrow 
Constraints cannot be grouped together using the shortcut (unable to verify, but I know a little bit ago when I tried, this happened.)
You’ll have to force it by putting everything into a model class yourself through the Explorer.