Sketchfab app closed when try use

Hi, recently i upgrade my account to plus, problem is when i try to enter from iphone 6s and ipad, app doesn´t work and closed. from windows laptop run very well all my models.
i try with other account from same devices and this work well.
what is the problem with my account? maybe a lot of heavy models?, exist a limit of models to see from app?

i hope an answer, thanks