Can´t find tv shows

Sonarr version (exact version):
Mono version (if Sonarr is not running on Windows):
OS: Synology NAS


When i try to find a new tv show i get this message:

“Failed to load search results, please try again.
Search for ‘homeland’ failed. Unable to communicate with SkyHook.”

Any ideias?

Thanks for the help.

mono 5.20 is broken on aarch64 due to Synology screwing It up; downgrade to 5.8

Can you explain how can i do that, pls?