Okay, but now there is another error, this time fatal (see attachments).
With the following in the log:
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
CREATE_OBJECT_FAILED in call AICreateSimulatedObject param #1 'FSDT_SafeDock3_wall_grey_off'
{'Airport': 'KJFK', 'User Pos': (40.656966666727435, -73.78050000000174, 8.28767 m, 4.17527 m, 241.99979088488018, -0.0014587028417736292, -0.00017453292093705386, -0.00013399114792587513, 3.98068812789917, 1.0)}
GSX SimStop
This is with FSDT KJFK v2 scenery.
Luckily I know a thing or two about SimObjects, and was able to workaround by adding this to C:\Program Files (x86)\Addon Manager\Simobjects\Misc\FSDT_SafeGate\sim.cfg:
[fltsim.38]
title=FSDT_SafeDock3_wall_grey_off
model=FSDT_SafeDock3_wall_off
texture=FSDT_SafeDock_AVGDS
So, at least my FNO flight on VATSIM is not ruined!
Cheers.