The current version of MountsJournal_Classic - v4.4.17 as per CurseForge - apparently references LUA files which only exist in the retail version of MountsJournal. On starting Cataclysm Classic and entering the world, I get these LUA errors:

MountsJournal/components/components.xml:7 Error loading MountsJournal/Help.lua
MountsJournal/components/components.xml:13 Error loading MountsJournal/SummonPanel.lua
MountsJournal/components/filter/filter.xml:11 Error loading MountsJournal/Rarity.lua

Thx you for the feedback, fixed :)

Thanks! 👍