Thank you for the logs. I see what’s happening.
Your server is retrying so much that Plex.tv has throttled your Remote Access attempts.
I could reset your certificate, which clears certificate throttling, but don’t know if it would be of any help here.
You might not have any choice but to turn off Remote Access for 6, 12, 24 hours and then re-enable.
How would you like to proceed?
bytes
Mar 26, 2021 12:51:43.858 [0x7f1909174700] DEBUG - HTTP 200 response from GET https://plex.tv/api/v2/server/webhooks?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx
Mar 26, 2021 12:51:43.877 [0x7f18df776700] DEBUG - HTTP 422 response from POST https://plex.tv/servers.xml?auth_token=xxxxxxxxxxxxxxxxxxxx
Mar 26, 2021 12:51:43.877 [0x7f18df776700] DEBUG - MyPlex: Published Mapping State response was 422
Mar 26, 2021 12:51:43.877 [0x7f18df776700] DEBUG - MyPlex: Got response for 20304561729f7705d2635f6aba52ee33a0440495 ~ registered :0
Mar 26, 2021 12:51:43.877 [0x7f18df776700] DEBUG - MyPlex: updating mapped state - current state: 'Not Mapped'