New to RadioEarn; small issue

Hi! Didn't see a post about RadioEarn in a while.

I've started using this service today for one of my first passive income services. Everywhere I read about it, people are saying that you can run 4 Radios at the same time in 4 different browser tabs but when I try to open my 3rd or 4th I get greeted with the message " This IP () already play 2 radios on this website."; anything I'm doing wrong?

Thanks a lot!