I have exactly the same error, and I can't access my Libraries in Photoshop mainly. It's very hit-and-miss, sometimes they work, sometimes they don't. Really frustrating. All Adobe Creative Cloud Apps are 'Allowed' through my Norton Anti-Virus. Just opened PS again, and they are working ok but the error message remains and can't refresh it in my CC app. These need to be consistent and work like they did a few months back. Please help.