Impossible login by 2FA

Hi! Please show me that 2FA screen. Does it look like Cerber’s 2FA form as shown here: https://wpcerber.com/two-factor-authentication-for-wordpress/

Yes, is the same 2FA screen.

It was working well until recently

Do you mean you’ve deleted WP Cerber but its 2FA screen appears? It’s not possible physically. That means you have NOT deleted the plugin.

Sorry

It was a hosting server problem. They told me they hadn’t done anything but it was a migration problem with DNS change.