Server key failure wnen host server

When i start VU Server i have problem “The server file could either not be found or invalid. Please verify that your server key is valid and present in your instance directory and try again”. So, I tried to create new key in my account, tried to request quota, take folder “Server” to many different places- nothing(((

I get an error message and I did everything as it should, I managed to create a server once, but since then I switched from windows 10 to windows 11

I have this problem too