Again - happens at EDDH with payware for airport and the Bredok 737max. With emty community folder it does not happen. Maybe it#s a mod or because more data has to be loaded?
Add: Now Ive tried it without the payware airport, and it seems, the warning message do not appear. We will see 
Might be that this payware airport makes problem since a while. I must say that I use SU10BETA.