Some of libraries were removed from github (footprints moved to another libraries) so they are “not found”. To fix the problem the libraries should be removed from your footprint library table (Preferences -> Footprint Libraries Manager).
I think that much better solution is to remove the default footprint library table that uses libraries “online” and download libraries from github using Preferences -> Footprint Libraries Wizard.
Using libraries “online” is dangerous because they may change without notification.