hi :)
what was the last thing that you did in the game? did you buy a buildable or skill item?
because i've heard of this happening after certain purchases and i now a solution for that (let me know)
if you didnt buy anything, you may need to re-set your reader..there are a lot of different reasons for snags and maybe i could help you
but can you give me more info on the last thing you did, or just before this happened?