@KBL007 I would suggest filing a ticket with Zendesk selecting the “I can’t download or install the sim” option highlighted in the screen shot below.
I hope you get the issue sorted.
Please also see https://forums.flightsimulator.com/t/checking-for-updates-ctd-fix/446022
and maybe a thread in this search result will also help:
https://forums.flightsimulator.com/search?q=ctd%20checking%20for%20updates