All four of the Raids I'm in right now are telling me 'Oops, the raid group tier at your level is full.' when I try to attack...I've already hit the minimum actions in each, and am one of the people making the group at my level be full...and one of the raids is my own! It would be nice to be able to keep contributing.
We have a fix being deployed for this right now, should be live in the game shortly which will resolve this issue.