Hello,
I just had almost the same error with a iFly 737Max at RJTT.
In my case the error reported was:
couatl v4.8 (build 5335)
panic log started on Sun Jan 28 10:16:19 2024
problem raised by addon <unknown>
Traceback (most recent call last):
File ".\GSX\assistanceServices\__init__.py", line 3426, in pushBackRequested
File ".\common\fsm.py", line 67, in switchToState
File ".\GSX\assistanceServices\__init__.py", line 3658, in enter
AttributeError: 'Departure' object has no attribute 'pushBackVehicle'
{'Airport': 'RJTT', 'Requested assistance services at': 'Gate 113', 'Requested parking services to': 'Gate 113', 'User Pos': (35.547003242070446, 139.76935256807243, 9.93072 m, 3.53272 m, 239.85313292591698, 0.00771965179592371, -0.0, 0.00010916603713693119, 3.5661599418640137, 1.0)}
GSX SimStop
createCamera() BaggageLoaderRear Behind
createCamera() BaggageLoaderRear Driver 1st Person
createCamera() BaggageLoaderRear Loading Area
I searched for intelliscene.cfg for the B737 Max but none was found.
On looking at the error and then going to the gate where this error occurred (no GSX pushback occurred and same symptoms as described above for Couatl to be restarted), I went to the airport profile within GSX, went to the Pushback tab and found no pushback was defined.
I changed this to one of the pushback options (selected Left) and this subsequently allowed the pushback to be initiated.
Problem resolved.