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
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!