AutoSSL fails With "The cPanel Store returned an error (X::AuthenticationFailure) in response to the request “POST ssl/certificate/free”: Unauthorized"

Symptoms:

When trying to install SSL, AutoSSL fails with the following error message:

"AutoSSL failed to request an SSL certificate for “DOMAIN” because of an error: (XID 622yab) The cPanel Store returned an error (X::AuthenticationFailure) in response to the request “POST ssl/certificate/free”: Unauthorized"

Description:

This error can be caused by the license file being outdated or not being able to be updated due to various causes (ports being filtered and so on). You can check the cPanel license_log for more information.

Workarounds

1. Run the license check script to update the license file:

/usr/local/cpanel/cpkeyclt

2. Then run AutoSSL again