Tried exporting XML and it only gets as far as "simplifying project". 3 clips perpetually loading

Hi!

I have a project that I am trying to export into XML. I have done this several times before recently, and haven't changed anything in my workflow, but with this specific sequence, premiere says there are still 3 files remaining to load in the media browser, but only names specificly one of them. I tried deleting that specific clip that it names, but then it still says there are 3 clips remaining and just specifies another clip. Everything works fine, I can edit, play and manipulate all the footage, including the one it says it is still loading, but when it comes to exporting it as an XML, which I need as a deliverable, the window that says "simplifying project" pops up and then nothing else happens. That window disappears and I cannot proceed. I have tried deleting my preferences, deleting the media cache, and even copying the sequence into a new project, although when trying that, it says the sequence, or some files within it might be damaged. 

Thanks in advance for any help!