I just found this very recent topic that seems to describe a similar issue, now solved by changing DNS.
Related topics
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Any major changes made to PMS? | 11 | 216 | October 20, 2021 | |
| DNS issue has not been resolved, still cannot connect | 46 | 1570 | October 24, 2021 | |
| Cannot connect to Plex app via app.plex.tv anymore | 14 | 454 | October 17, 2021 | |
| Did the plex.tv servers died? [solved] | 7 | 777 | January 19, 2019 | |
| Server Unavailability | 7 | 126 | January 26, 2019 |