Do you happen to have KLAS by FlyTampa installed also?
Both EKCH and KLAS have folders called
…\MaterialLibs\FlyTampaMatLib
Because these sceneries have the same folder name this can trigger a CTD.
I believe that any duplicated folder names located in MaterialLibs folders that are active can cause crashes.
If you don’t have Las Vegas installed also then you have a different issue and your best bet would be to seek help directly from FlyTampa who are excellent developers and will certainly work with you to fix your problem.