this is the important hint.
You can search with it in forum:
https://forums.flightsimulator.com/search?q=ucrtbase.dll%20order%3Alatest
to try some things.
Solution
A question:
- Have you installled the English Language Pack ???
( not change the language, only installed English Language Pack is necessary (united state) )
Latest one I remember with same c0000409 & ucrtbase.dll was:
answer =>
So, possible check the c++ libs too.
…
EDIT: shorten and marked the solution