A connection that was expected to be kept alive was closed by the server.

Get this error after setting up caldav. It worked when i first set it up, but now I get an error. And it seems to work intermittently. Not sure whats going on. My mailserver is controlled by a thirdparty within Cpanel

[CalDAV / CardDAV]  MailClient.Accounts.ConnectionException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. —> System.Net.WebException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.

If it was working, but now isn’t, then I would look to the server for a reason. Maybe something was changed or updated there.