"There was an error while reading this stream" and grey rectangle in bottom of some images

i think the cause of the error message is that grey rectangle  but i dont know how to fix  and  everytime i get to the page where there's grey rectangle the page's blank and i know that i can read the pdf file in the browser but i cant edit in the browser also its very annoying not to see the whole page so i want to fix this in the app (also i am using the free version) .