What CMS and client version are you using please?
Can you install IE 11(if you haven’t already) and Xibo for Windows 1.7.8 (which will do this registry change for you)
After that, please go to Modules page and click the ‘verify all’ give your player some time and it should work just fine.
If it does not work after above steps, then please post a screenshot of status window on your device.