Lines 52 and 94 have errors and UBO will not save the list because of that.
Edit: Never mind, I was setting it up in "My Filters" tab instead of adding the RAW URL to my custom filter list. Now I was able to add it, taking it for a spin, see if it actually works.
Many of the entries seem very simple - anyone know if it is easy to locate the elements that need to be filtered to create your own entries? Would love to add some more newspapers in my country not found in that list.
In regards to which elements to pick out, I wouldn't know what to tell you other than monitor the Network tab in the browser's devtools and block one by one until it works? Other than that perhaps reach out to someone more experienced at generating these filter lists (like the Dev of the linked repo) and see how they go about it.