https://www.flytampa.org/forum/viewtopic.php?f=28&t=14204
It appears MSFS has issue with EKCH and KLAS containing the same folder name. The following change to KLAS fixed my CTD at EKCH.
Rename the subfolder FlyTampaMatLib to something like KLASMatLib
\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Official\OneStore\flytampa-lasvegas-airport\MaterialLibs\FlyTampaMatLib
Update layout.json file for KLAS by replacing ‘FlyTampaMatLib’ with the new folder name (e.g. KLASMatLib). There are 4 rows that need to be updated.
As i had both airports when i renamed KLAS folder and updated layout.json , EKCH worked with out any issues. I tried deleting content.xml which worked in the beginning, but later EKCH crashed again.
if this fix works, means that Flytampa needs to update KLAS folders