Update Sonarr, this is several stable releases out of date. thexem.de was replaced with thexem.info in later releases.
22-8-10 11:54:31.2|Error|X509CertificateValidationService|Certificate validation for https://services.sonarr.tv/v1/scenemapping failed. RemoteCertificateChainErrors
This is the issue, you can’t make a secure connection to your indexers, there are several posts on this topic and the solution is the same