That’s actually including a file, and isn’t cached.
Few ideas:
- Attempt to delete that specific file. Guessing it wont work cause you installed it w/ the pkg mgr, but you never know.
- Open up the DB and edit the wayfinder snippet, comment out the line including the class (or just the whole thing!). I’m guessing you’re getting that error when it wants to generate the wayfinder cache (don’t know how else it would be triggering a snippet trying to load the manager)
Something that you can try is creating a simple php file and from there try to chmod() some files. If you do it right you can make it recursively chmod entire folders. There may be some copy/paste snippets out there on Google that do just that.
I’m going to add a note to the upgrading doc to make sure you have updated all addons to the latest versions and to check custom devved ones too, you’re not the first that had issues after updating, tho you are the first that I know off that got totally locked out

lol