In the patches leading to The War Within the plugin had stopped working.

Thank you for bringing this to my attention. I will be working on it to have a fix soon.

To elaborate, it seems Blizzard is renaming function calls in the patches leading to The War Within. Several of my plugins throw errors and in many, users have identified and posted manual fixes for renamed function calls. I suspect the same has happened here. Hope you can fix this.

Resolved by 61ab0dc and release pushed to curseforge.