I've reinstalled the new update, and the rivals tab is now gone. I have the addon acitve but nothing is showing, no features. Its as if no add on exists. I am getting no errors as well.

I remember this add on used to have multiple folders, such as the following:
PetTracker_Upgrades
PetTracker_Switcher
PetTracker_Journal
PetTracker_Config
PetTracker_Breeds

However this download is just the "PetTracker" main folder/addon. Am I missing separate downloadable components I need to also find?

I tried a fresh brand new install, with no other addons what so ever and I get the above mentioned result. Nothing. No features, no errors. I also tried a mix of the older folders named above with the new one in this specific download and its LUA city as expected, so I assume either you have consolidated the addon into one folder and I'm having problems myself, or I at some point had other folders I forgot downloading separately?

Any help would be appreciated as this mod makes pet battles actually worth doing.
Thanks,
Xero

Well thanks for closing this and not even responding with a shred of assistance. I'll just use an add on that actually works instead, with a creator who gives a shit.