as mentioned, the issue is here in the Third Party Addon 
( or the api was changed in a way that the add-on now cause that )
A modable-game developer can not regression test all existing add-ons. The developer of a third party add-on is responsible here to stay up2date ( at least if she/he is intressted that users buy in future the products too ).
Of course MSFS might have a better error handling ( or should have ) to made it easier to find out “whats wrong”, but it is at the moment as it is…
For me intressting is:
may be reason for some users in the new/big thread about " memory could not be read" have similar cause…