*Hopefully you mean IPTVXtra2 v.7.7
Some systems will not setup the default settings file for the pvr during install (???), so when IPTVXtra2 tries to open pvr settings file, it is not there.
- so -
Go to System Settings/ Addons/ My Addons/ PVR Clients/ IPTV Simple Client/ Click Configure/ Click Defaults/ Click OK to Save settings.
Go back to IPTVXtra2 and click PVR setup & System Tools/ Create custom m3u.
Wait for confirmation to load PVR settings.
Select Yes (confirm Restart Kodi message (3 times)
Shutdown and restart Kodi.
Pvr should load normally.