Let me summarize:
every mod you activate causes a problem with the map.
you are using Vortex (which shouldn't be a problem!).
It sounds like something is wrong with your game installation (whatever caused it).
Questions:
- what version of Enderal Forgotten Stories do you have installed? The Steam version, if so the classic or the special edition.
There is also a version of the special edition on GOG and one from the developer Eddoursul.
- Are your mods written for the respective Enderal version (there are two sections on Nexusmods, one for the classic version and one for the special edition)?
- if you have one of the two Steam versions, have you had your game checked for bugs as urst linked above?
Otherwise try a clean install.
It is best to deactivate all mods first.
Back up your saves first and copy them back afterwards.
Uninstall Enderal and manually delete these remaining folders:
...\SteamLibrary\SteamApps\common\Enderal or Enderal Special Edition
C:\user\“username”\AppData\Local\Enderal or Enderal Special Edition
C:\user\“username”\Documents\my games\Enderal or Enderal Special Edition
Then reinstall your game and copy your saves back (we think it is unlikely that there are errors in the save itself).