Error when loading course into LMS

Hi. I've worked with Rise for as long as it is has been around, published tons of courses. I have a series of three courses I did for my client and one of them will not publish to the LMS. I've checked and find no difference in the settings among the three courses. The problem seems to have to do with the attached resources, but I've never had a problem attaching PDFs before, and the other courses have them as well. I can't post the course to the forum because of NDA, but I have attached the error they are getting. Is there a place I can open a ticket with Articulate?