I tried to connect to my website with my smartphone via mobile network (LTE) (which is not my local wifi) and it is also not available from there. No, everything runs on the same machine / same browser. Okay, now the website is online again. And also C-Panel is available again. Wow, like a miracle. Edit: But phpMyAdmin still doesn't work. Edit: Okay, i changed my password, now i can log in again. But now i get an access denied error. Edit: okay, i see my database now but i get an internal server error 500 with my database request from my PHP-function. Edit: Okay, now it works!