This is in the case someone else stumbles upon this error(such as through google). I stumbled upon this error and found the reddit thread where someone else had the same issue, but no resolution(beyond reinstalling the game). The cause is the Morrowind Code Patch, specifically Script expression pars...

With Mod Organizer 2, here's how to do it( and how I did it), in case someone from the future wants this: Preparation: 1) Create 2 new mod folders called something like "morrowind-esm" and "morrowind-data". Move Morrowind.esm, tribunal.esm and bloodmoon.esm into the morrowind-esm mod folder, and all...