Error with stock airports

Hey @scruffyduck
me and an other friend we have the same error when trying to open a stock airport in P3D
for me it's with P3D v4.4 and him with v3
here is a pic of the error, hope you help us
thnx in advance :)

EDIT : i updated tto 1.76 but now i don't get error, instead the ADE just freezes when loading : "Detailed footprints" :(

Edit2: it now works, all i had to do is to wait 5 min, and that a bit too much from a busy person with limitted time perspective :(
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