According to the readme:
The EPG URLs are embedded directly within the playlists.
Does that mean I should leave the XMLTV Guide Data as blank and it should automatically update for the guide data?
I'm definitely not an expert at this.
If you'd prefer to manually add the EPG guide, you can find the relevant URLs for each service on this page.
The EPG URLs are embedded directly within the playlists. If you'd prefer to manually add the EPG guide, you can find the relevant URLs for each service on this page.
You could also download the playlist and open it with a text editor.
Then copy the EPG URL and use that.
Example
That's very helpful, thank you! I'm slowly getting myself edumicated on all of this.
I think this project is just gone
Yep, it sure does appear that way 
I still have access to feeds from Roku using this script deployed from my Google account. Looking at the code closer, it appears that was the only service that wasnât reliant on the devs repo.
Rokuâs also the only service on that script that wasnât available via other containers, AFAIK, so thatâs great news.