Login problems without VPN

Hello, I am from Germany with a GPT “Premium Account” for 20$ (for over a year) and would like to log in as usual. Unfortunately, for some time now, after I have entered the login data, nothing happens and the loading screen is displayed forever. If I activate a VPN with a location in Germany beforehand, I can log in immediately and without any problems using my login details. I honestly don’t understand why it doesn’t work with my “normal” IP, does anyone have any ideas? How can I log in again with my “normal IP”? Thank you very much for your help!