Help - cannot export and premiere keeps crashing with AEVideoFilter.cpp-1549

Help! I was working on a premiere pro project and when it came to exporting it via media encoder it kept failing 7 seconds into the film, and when I check the log it says:
Encode failed because the source duration is nil.

Now, when I open the same project that I was trying to export in premiere pro, I keep getting the message:

That says:

[/Users/dvaeng/releases/dva/shared/adobe/MediaCore/MediaLayer/VideoFilterHost/Src/AEVideoFilter.cpp-1549]

In media encoder, the export kept crashing 7 seconds into the film, which led me to believe that it might have been to do with a template or png that I was using there, but when I delete that in recorvery projects I still cannot export/premiere often crashes. 

The couple of threads I have found on similar topics have not worked yet.