I had students authorize google drive to submit an assignment for a course. Most students read carefully and checked the box to allow access and they were able to continue as normal. However, I had some hit continue without clicking the allow box, now a drive error is appearing and I am not seeing how they can authorize access after denial. 

Any help would be amazing. In the meantime they are downloading the file onto their chromebooks and uploading it to Canvas, but that is a headache.