All indexers are unavailable due to failures for more than 6 hours

Sonarr version (exact version): 20210717-19
Mono version (if Sonarr is not running on Windows):
OS: DSM 7.1-42661 Update 2
Debug logs:
Description of issue: All my indexers stopped working a few days ago. Although they are the same I use within Radar and they are working there.

Your SSL certs are invalid this is ultimately caused by SynoCommunity introducing a bug that they don’t seem to have any appetite to fix going on 6mo+ now.

The sonarr team has nothing to do with the outdated, buggy, broke SynoComm packages.

DSM7.1 does not support the mono fix command, so your only options are to switch to docker or roll back to DSM7.0

There are several threads/reddit posts on this topic, it’d be worth looking for/at those as well.