I'm sorry you're having trouble. I'm currently going through old posts and came across your post.
Could you please confirm if you still require help?
In the meantime, please clear your browser cache and cookies and ensure you have installed the latest version using a different browser or in incognito mode.
Please let me know how things are going, as I'm here to support you in any way I can, and looking forward to hearing from you.
Did this ever get resolved? I am having the same issue recently. Libraries are fine in all other Adobe apps, but Express (on the web, app, even mobile, different devices) hangs and goes unresponsive trying to access libraries.