Backblaze times out when validating a remote destination.

Symptoms

When Backblaze is configured as an additional destination, the destination never validates.

Description 

After BackBlaze is configured and you go to validate the destination, this spins with " Validating …" and eventually times out with the following error logged in /usr/local/cpanel/logs/error_log:

 error: CODE :500: MSG :500 Timeout: Timeout [backup_destination_validate]

Workaround

Verify that you do have a working account and also verify the server can reach the destination, as an example:

 curl https://api.backblazeb2.com/b2api/v1/b2_authorize_account

If you get a 401, you'll want to discuss this with Backblaze as they may be having temporary issues with their service. BackBlaze Support