My Threads:
Réstéd-XP Classic | Wrath | Retail - | - Zygór Classic | Cata | Retail - | - Dugíz Classic | Cata | Retail - | - Hayden Hawke's Secret Gold Guide - | - User Interface collection - | - [Compilation] WoW Gold farming Recommendation
I just tried again as a test, here's what I did step by step. Downloaded your guides link in the op and extracted contents with 7 zip. I downloaded the latest rxpguides release and the latest rxpguides cata release to try both versions (not at the same time, just one then the other). Deleted guides folder and replaced with your guides folder. Placed the rxpguides folder into the interfact folder. Loaded up the game and went to choose a guide but the guide stops at level 26.
Here is an image showing what's happening: RXP-ERROR hosted at ImgBB — ImgBB
Could you double check your guides folder in the OP? Maybe it's missing files in the recent update you posted.