My internet is okay, but I don't know why I'm getting this error:
They cannot offer their services in your country I guess. Try using a VPN, although at your own risk.
This is not a good idea, in my opinion, unless the person has contacted the casino or checked through their T&C and they are not against that, because you can get into trouble even if it's not in an instant; it can happen later, maybe after a big win, and they discover you are playing from a restricted jurisdiction. You know what that means.
I have seen their advertisement so many times on Meta. I think this advertisement is shown sometimes based on how we access the casino, because when I don't visit the casino, I don't usually come across the advertisement, but ever since I used it a few times, I have been seeing the advertisement every now and then on Facebook and sometimes on some blockchain explorer sites. Pliko is one of the game options that's shown constantly.