Do you also have FlyTampa KLAS installed? It appears MSFS has issue with EKCH and KLAS containing the same folder name. The following change to KLAS fixed my CTD at EKCH.
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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.