Form 8829 - Lesser of square footage or 300

I am trying to efile my taxes and have one error keeping it from being submitted. On Form 8829 my home office information Line C says enter the lesser of your office's square footage or 300. My home office is 115 square feet, so I have 115 entered which is less than 300. However it keeps saying "Need to review" so for some reason 115 is not being accepted and it is holding me up from submitting my taxes. I don't understand because 115 is less than 300 square feet and I don't what else to put in that box.