Corrupt pdf files

So I’m new to Storyboard Pro, and I’ve done some exports to pdfs so that I can view it in Adobe, and they were working fine, until recently it says that the pdf is corrupt in Adobe. It’s really frustrating I’ve tried to use other programs or change my export settings, but the program isn’t liking the files that I export under any circumstances. Even Microsoft Word won’t read the file anymore, any suggestions

Needs more details… Have you recently updated Adobe Acrobat?
What is the full path where the PDF resides?
What is the filename of the PDF?