Sonarr v4 Upgrade: Value cannot be null. (Parameter 'source')

Sonarr version (exact version):
Mono version (if Sonarr is not running on Windows):
OS: Docker/Debian
Debug logs: Log File
Description of issue: * ReleaseRestrictionsSpecification: Value cannot be null. (Parameter ‘source’) error when trying to send a release to download client. This error just started after I updated to V4 by updating the docker container. Sonarr can find the release, but I get a red exclamation mark with the error. I can download/send the releases manually to the download client. But it won’t fetch the files automatically. I did not change any settings when I made the upgrade.

Any assistance would be appreciated.

Check any release profiles you’ve configured, looks like something in a required term might be invalid, re-saving might correct the issue.

Thanks. For some reason, a blank release profile was created during the upgrade. I didn’t even notice it since it was blank. I deleted it and now everything is working. Thanks for your help.

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