Airport Project CTD with SKD 15.0

Because of limited time and also stability after SU5 with the scenery editor I
have not tried to work on my airport project for a couple of months. My
project was initially designed beginning almost a year ago just as a learning
project for the SDK. It was working in the sim after SU5 but I did not add
anything or work on it. I just checked it at that time to make sure it was
working. Yesterday I downloaded SDK 15.0 and tried opening my airport project
to continue working on it. Every time I load the sim after building the
package the sim crashes to desktop as soon as the aircraft loads into the
airport. I cannot even get to the point where I can try and load into the
scenery editor. I am at a loss as to what the problem is here. I have not
worked on anything or made any changes in 2 months and yet now I can’t even
load the project to test or continue working on it. The Windows Event Viewer
shows the following error: Log Name: Application Source: Application Error
Date: 11/3/2021 9:45:56 AM Event ID: 1000 Task Category: (100) Level: Error
Keywords: Classic User: N/A Computer: BRANDON-DESKTOP Description: Faulting
application name: FlightSimulator.exe, version:, time stamp:
0x00000000 Faulting module name: FlightSimulator.exe, version:, time
stamp: 0x00000000 Exception code: 0xc0000005 Fault offset: 0x000000000235ddc7
Faulting process id: 0x4008 Faulting application start time:
0x01d7d0c103415bfe Faulting application path: C:\Program
Faulting module path: C:\Program
Report Id: 8b662c9e-7ccd-4be8-9b71-9dbf6aecf849 Faulting package full name:
Microsoft.FlightSimulator_1.20.6.0_x64__8wekyb3d8bbwe Faulting package-
relative application ID: App Event Xml:">; 1000 0 2 100 0
0x80000000000000 10203 Application BRANDON-DESKTOP FlightSimulator.exe
00000000 FlightSimulator.exe 00000000 c0000005 000000000235ddc7 4008
01d7d0c103415bfe C:\Program
Microsoft.FlightSimulator_1.20.6.0_x64__8wekyb3d8bbwe App | | |

As a further update on this I tried spawning into one of my airport parking
spots and it worked just fine. When I try to spawn on the runway that’s when
it crashes. I saw a thread on FSDeveloper site about having a Primary and
Secondary Runway start or you would experience crashes after SU6. However my
airport already has both a primary and secondary runway start assigned. It
seems though that something with the runway start or runway is the culprit so
I will keep investigating since I am able to spawn into parking ok and load my
project in the editor from there.

I deleted my runway starts and created new ones and I thought that it was
fixed. However after multiple times trying the only way I can get into the
editor or into my airport is to spawn into a parking spot. When I spawn on the
runway the game crashes. I have no errors in the compiler for my project and I
can’t see where anything is wrong. It just CTD every time I spawn in on the
runway. The only way for me to continue working on this project is from a
parking spot but then I don’t know what else is wrong and if I am going to be
doing more work just for more problems…ugh…