File will not Link

I rendered my project ready to export and when it was exported it had a black and green square in the clip for one of the camera angles. I then went back in to try and remedy the problem. Now the file will not relink. I have placed the file in a new folder. I tried to delete the rendered files, however as I had reopned and closed the project this was not possible. I have opened pre-saved versions to see if an non corrupt version exists but in every version the file will not link. Any advice is welcomed. My Premiere Pro is running the lastest version.
