Hello,
This seems to be simulator-related, see; https://forums.flightsimulator.com/t/wasm-err-fatal-file-error-239-ffffff11/379889/4 https://devsupport.flightsimulator.com/t/possible-issue-with-wasm-and-username-encoding/7188
Especially the second link. By the looks of it, some kind of windows-username issue. Could you verify what your username on Windows is if you're comfortable with that?
I would recommend a uninstall and reinstall of the aircraft regardless.
Thank you π