If you are sure that is no the case, then It’s most likely your hosting provider is blocking your website from being registered via the theme.vision host…
In that case, you will need to contact your hosting provider to enable PHP cURL connections to remote websites.
The theme version 1.5.0 isn’t released yet. Once when we release it you will see the pending update in your WordPress dashboard but in order to be able to update you will need first to register your theme.
Without the registration, the automatic update won’t work