Probleme go control

The application is registered and a confirmation is sent to your email inbox. But after closing the application, it is not possible to log in again; only the trial mode is available. Re-registration is not possible; it shows a message that the product is already registered for this mailbox. Two mailboxes and the same result. The application does not work properly when restarted. Resetting the password does nothing.
I deleted the application and then reinstalled it, after which the login occurs and the device is in agreement with the application, but after closing the application, re-login is not available again. Location Wi-Fi and bluetooth are included. Firmware version 52-8456a6b7-8, program version 1.2.8