Inspired by a new plugin (Filterverse):
https://www.bandlab.com/track/1a592077-b260-f011-8dc9-000d3a960be3?revId=19592077-b260-f011-8dc9-000d3a960be3
Definitely late night listening.
I think they'll have to revert to bitmapped graphics (and soon before they add new functionality so they can seamlessly reuse the existing themes from CbB).
Suggestion.
Remove all the VST paths (note them down first!) and reset.
Do you get the error?
Add one back in and rescan?
Do you get the error?
Repeat until the error comes up. Then look in that folder and its subfolders for anything that looks "odd".