Error Message on Managed Backups

Hi there! Since today I'm having this error with Snapshots Managed Backups:

It seems we encountered an issue communicating with the remote service. Please, make sure your site is able to perform remote requests to https://premium.wpmudev.org/.
If you're still having this issue, please feel free to open a ticket with us here.

I've already tried disconnecting, regenerating the key, disabling and re-activating the plugin... But seems that nothing solves that.

Any help? Thanks!