Please provide the following information:
1. Is InDesign installed on the default path?
2. Do you have any special character in the path where InDesign is installed? Like username has special characters.
Also, please provide a copy of you preferences, you can zip them and email to email@example.com.
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Same problem for me. I can see and select the items in my first library but i cant switch to f.e. Adobe Stock. It´s wet frustrating and i worked as designed earlier.