There are some programs that can make it look like you're using a vpn, Security, parental controls etc. I had this problem with another game. Resetting my router fixed it.
The solution provided by Mega_ seems to have worked for you. If anyone else has this problem and doesn't know how to do it, feel free to contact me via the contacts I have given below. I will be closing this since this has been resolved. Feel free to start a conversation with me or any other staff on Forums or message me on Discord (Aly#9999) if you'd like this thread re-opened or have problems regarding this again.