Player.js errors are usually caused by a corrupt or missing MacDVD Format Issue 193 file, sometimes due to a malware infection. The first way to fix these issues manually is to replace the JS file with a fresh copy. We also recommend running a registry scan to clean up any invalid Player.js references which could be causing the error.
Our database of Player.js file versions for most Windows operating system versions (including Windows 10) can be downloaded below. If we don't have a copy of your Player.js version, simply press the "Request" button to request a copy. Some file versions may be missing from our extensive database, and in those cases, you might need to contact Future Publishing.
Even though most problems related to errors assocated with Player.js should be fixed if placed in the correct directory, you should carry out a quick test to confirm. Test the result of the file replacement by installing MacDVD Format Issue 193 to see if you still get the error.
Most JS errors are caused by missing or corrupt files. Your mediaelement-and-player.js file could be missing because it was accidentally deleted, uninstalled as another program's file (shared with QuarkXPress), or was deleted by malware.
Furthermore, mediaelement-and-player.js file corruption could be caused from a power outage while loading QuarkXPress, system crash while loading or saving mediaelement-and-player.js, bad sectors on your storage media (usually your primary hard drive), or malicious software. It could be a software infection. That's why it's so important to make sure your antivirus software is kept up-to-date and scanned regularly.
For more detailed informations;