We are getting this error when trying to grade: Cannot open the PDF. The file may be corrupt, or in an unsupported format.
Our developer told us we needed to instal unoconv on the server. The IT company believe that they have now done that successfully but we're still getting this error.
Any tips for the developer/IT company on how to get it to work?
This error started appearing when we upgraded from 3.3.2 to 3.5.