Hi.
Yesterday when i was claiming my 5 BAT’s i had to go through the procedure of dragin the triangle into the shapes i was requested. although i dragged it as i should it didnt work and said there was an error then i refreshed the page did it again but still it didnt allow me to finish the dragging and again said to try later. after that the claim option disappeared and the coins too!
Hope to get help
Please see the official thread: May 5th Ads Reward Claim Errors
A fix is on the way. 
Closing this thread.