The information offered by the links has changed. That is why I indicated previously...
---------
If you have NFPSF1 in your epg url, replace it with NFPSF3. If you have NFPSF2 in your epg url, replace it with NFPSF4. Things have changed.
Clear data in TV and the Guide, restart and you should be back in business.
---------
If you look at page 1 in this thread, you will see the following...
NFPSF1=24 hour, title only. (use this on fire tv stick or other low ram devices)
NFPSF2=24 hour title only offset one hour, for those having issues.
NFPSF3=72 hour with details
NFPSF4=72hour with details offset one hour, for those having issues.
EDIT: I now understand what you are saying. You'd need to use the PVR Stalker Client built into Kodi to enter your own epg url in the configuration settings.
I wonder if the latest PVR Stalker NFPS is using the old urls and thus the lack of description. If that is the case, maybe Psycon or Blackbear can switch the information being accessed by the urls, changing NFPSF3 and NFPSF4 to NFPSF1 and NFPSF2...and visa versa.