Yes I am 100% sure both my computer and my software is updated to the latest version.
I can never get Libraries to show up consistently. Sometimes it will load but then if I close the window and open it again I lose it. Very frustrating to depend on it and it doesn't work.
Libraries are so fussy. I have this issue occassionally. Try the suggestions from AxelMatt. I also go to my Creative Cloud app to see my files in my libraries. You can drag and drop files in there.
Melissa Piccone | Adobe Trainer | Online Courses Author | Fine Artist