You’re on the right track with renaming folders to be shorter. But you have to be careful. Any folder or file inside the main addon is keyed to the layout.json file as well as other cfg files. I’d suggest not changing any files or folder names inside the addon unless you’re sure what you’re doing.
Better option is to move your community folder somewhere to a place where the total file and folder lengths will be shorter. It’s more work but will stop this issue from ever coming back.