LibraryDeriver::$basePluginId must be string

After further research It came to my attention that in the update of the ui pattern module the definition of the protected variable $basePluginId was removed from the LibraryDeriver class.
I replicated the same change in the wingsuit ui patterns module and it works. I no longer have the error in question

Patch #2 is working for me.

Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.