All indexers are unavailable due to failures

[Taloth]

Probably a dupe:

Newznab Indexer Error - Error: SecureChannelFailure (Object reference not set to an instance of an object) ---> System.NullReferenceException: Object reference not set to an instance of an object

Sonarr version 2.0.0.4753: Mono version 5.0.0: OS: CentOS 7.3: I started noticing this error with Radarr today and then I had a thought to check with Sonarr. It was still working but when I restarted the Sonarr service (CentOS 7.3), it too stopped working. I recalled that a recent yum update included an upgrade to mono. First tried rebooting my OS hoping it would resolve something (library dependency or such) but no luck. Then I started digging for the mono update in yum history and rolled i…