My friend's account is keep getting blocked (#BF05)

Edit: Fixed, he managed to get it work with different connection and different device.

Hi.

I wanted to start play there with my friend, but his account is getting banned again and again. We bavery ever played there before and wanted to give it a go now on TBC, but his account is keep getting blocked. He got unban two times this week but immediately when he tries to log in on the website it gets suspended few seconds after that.

Any suggestions, help for this case please? I also tried to make a ticket but GMs provided zero help unfortunately.

Picture: https://ibb.co/C53tybq

Thank you