I’m looking at the image on the link you provided.
Does deleting the saved FLT and PLN files let you in?
Look at this topic:
https://forums.flightsimulator.com/t/i-cannot-load-any-different-airport-and-plane-always-the-same-airport-and-same-aircraft-non-ascii-windows-10-account-name/302113/97
In particular, this post:
https://forums.flightsimulator.com/t/i-cannot-load-any-different-airport-and-plane-always-the-same-airport-and-same-aircraft-non-ascii-windows-10-account-name/302113/95