epub files fail to upload

[Joyner Library]

Hi Team,

My library is running DSpace 9.2. People can submit pdf files but not epub documents. The upload screen gets to 20% and stops. I have attached a few error log files and a screenshot from the development tools. I failed to find a full error message in the dspace log file.

Please let me know how I can troubleshoot this further.

Thank you,

Nick