https://wowpedia.fandom.com/wiki/Patch_10.1.0/API_changes#Scroll_Templates

This library appears to be using the FauxScrollFrame template, which is currently deprecated and will be removed completely in a future patch. I've attempted to simply replace "FauxScrollFrameTemplate" with " ScrollFrameTemplate", but this just causes the FauxScrollFrame_Update, FauxScrollFrame_GetOffset, and FauxScrollFrame_OnVerticalScroll to throw errors.

Are there any plans to update this library to account for these changes?

I'll need to get wow reinstalled to play with it

unless someone can find a guide on how to use this, i'm afraid it will be using the deprecated methods for now.

It looks like they did not provide a drop-in replacement or any sort of guide for migration.