Basic questions…
- Did it work before?
- Have you verified their server is up and running, they don’t have any remote access issues?
- What version of PMS do they have installed that’s hosting their libraries? Versions between 1.41.7 and 1.42.0 had a security issue and Plex have locked those from being accessed by anyone except the owner.
Plex Media Server - Security Update - #3 by PlexInfo - If it’s none of the above… are you experiencing this on a specific app (which platform, version) or across different clients?
