It isn't that large of a publication, this is the 16th issue, and they have all been around the same size as far as number of articles and the size of each article. Last issue, which published in October, I had no issues at all. I uploaded the articles, preflighted and published. This go around, I uploaded the articles, and am unable to preflight them. I'll put the screen shot of the error I'm getting, i've tried different browsers as well as different computers.
I also noticed that the publish/unpublish buttons are grayed out, even on previous articles/collections.
I've asked my client to look on their end to see if the user roles have changed; but again they shouldn't have because as far as i know nothing has changed between October and now.