Tried to provide them with four pictures, in their requested formats PDF and JPEG, sent from two different computers and emails. No matter what we tried they were not able to open the pictures. Tried to open the files from 3 different computers and they were all fine. I even provided them with a Gdrive folder with the pictures in it. Obviously a problem on their side with systems and/or terminal/computers. I´ll rather take my business to a hotel chain with computers and systems that work.