Quick fix: get a VPN. For $5 a month that should fix it.
Other fixes: try
https://github.com/Zaela/p99-login-middlemand, and if that doesn't work search for this issue, which others have faced before and solved.
I say this as a Linux user who doesn't have this problem anymore (I fixed it years ago with a VPN, but haven't needed it with newer installs).