Indexers not working

Sonarr version (exact version): 3.0.6.1196
Mono version (if Sonarr is not running on Windows):5.0.8.108-11
OS: DSM DSM 6.2.4-25556 (DS418)
Debug logs: https://drive.google.com/file/d/1Ftpl_woAm-cRBOh-TTk1wiz-to7gh4iG/view?usp=sharing
Description of issue: Indexers cannot connect anymore after upgrading DSM to version 6.2.4-25556
System.Net.WebException: Error: TrustFailure (One or more errors occurred.): 'https://api.dognzb.cr/api?t=caps&apikey=(removed) —> System.Net.WebException: Error: TrustFailure (One or more errors occurred.) —> System.AggregateException: One or more errors occurred. —> System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. —> Mono.Btls.MonoBtlsException: Ssl error:1000007d:SSL routines:OPENSSL_internal:CERTIFICATE_VERIFY_FAILED

5.0.8.108

this is not a released mono version

sounds like the DSM update broke mono?