GreenLaser:
The member say it gives him error code 1075 his tier doesn't allow him to play, but the tournament I created is open to all tiers.
There's like a billion posts on the Error Code 1075 bug if you use the Search to the right. The tl;dr version is that WGT has been aware of the issue for months, but every month they say "it needs more testing". Who knows if it will ever get fixed.
In the meantime, closing the app and then re-opening it (sometimes several times) seems to work as a fix for some people.