[stumped]

You say that everything worked before the big windows feature update, and not afterward. So the answer is that windows has changed security settings. It tends to do that with each big update.
So you have to go into windows settings, find all the ones that affect sharing files on networks, and set them correctly. I am typing on tablet so I cannot view mine as I type but that is the area you need to focus on. You need to be on a private network with discovery and sharing enabled.. you may also have to use user names and passwords in areas where they were not previously required. Each windows improvement? tightens security and new defaults are hiding the library pc from the phones so they cannot access the server. CC is probably remembering what worked before the windows update, and so it is not asking for new credentials. If you force stop and clear data for the app it should then ask if needed when restarted.
I had similar fun with a new pc which stubbornly would not let my other pcs connect over LAN to see shared folders until I created a new additional user name and password credentials pair. , googled how to erase the old empty credentials and connected with that special pair and not my normal unprotected login. And moved all shared stuff out of c\users\ .... Into other common areas