I haven’t played the update yet. I’m wondering if it happens with new saves too?
Not sure. My game crashed while playing an “old” save. I started it today and reloaded it before this mini update. I wonder about Alpha 36 though. As this was a mini update, how will Alpha 36 come along. Oh well.
@TheAviator I started playing a new airport yesterday on 35.2-0 and I am seeing the same behavior. No staff or vehicles.
When loading up, the game told me that something went wrong with loading and to submit a bug report. ACEO-26023
I started with Alpha 35.2-2. QuickQuestion: I feel stupid for asking, but how do you take a screenshot?
@jeeringsole Just loaded up the game, I get the same pop-up. It seems all of the revamped airlines’ aircrafts seemingly disappeared from the aircraft stands and the flight planner.
Do F12, Or External Software.
Thank you @kiwikiller41!
I have Been Using PCs For A Long Time, (Plus The F12 Is For Steam)
Also, I feel like not too many know this, but you can press F4 to toggle the UI in order for pictures or following vehicles without seeing the info about them when following them.
You can also (at least on Mac) press command, 5.
Thank you everyone for all the commands! I feel like a noob for not knowing these until now.
Once you take your screenshot with F12, you’ll find the image ate:
C:\Program Files (x86)\Steam\userdata\46374176\760\remote\673610\screenshots
I also wonder why the Devs introduced regional airlines. I know it makes very logical sense to do this since the airplanes in the different airlines are not corresponding realistically, as a large airline would have either a subsidiary or have a specialized airline run the routes for them. This could be their main intention for this update but I would also like to throw out what many of you may be speculating, and it’s specialized private or even charter flights. With alpha 36 in mind these specialized flights would add a new aspect into aviation for ACEO but also not confuse players if they were to release it in a future update.
A very controversial idea I know, so I want to also see who agrees or thinks otherwise. Because I know many of us want to see these different airplane and airline classes. I know I have given very broad information, and that is what I want you to speculate. 
I had to read that 3 times to understand. 
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It seems that the zone duplication spam issue has worsened, at least for me, since this latest patch was pushed today. I’m finding that I need to save and reload the game after I build a single wall in a secure zone. The reload does help a little, but it does not seem to be as effective as it was for me prior to the patch release when I encountered the same issue. This is with a new game start after the update went live.
Edit: As a work-around it appears to help to delete a secure zone around a space I want to build in. I didn’t encounter nearly as much zone duplication spam when I removed said zone, built my walls and rooms, and then added the zone back in afterward.
New airport.
Six small stands, all domestic.
Passengers arrived and all looks fine. But no airplane showed up. Let it run for one more day, but nothing happened.
I was building toilets in the security zone. When I was placing the walls, the game got frozen for some seconds before I could continue. Plus the game created an separate security zone. I rebuilt it again and it worked at the end.
The game created two security zone between the waiting lounges and the small stands (was both connected through a door). After I reload the game, the security zone merged.
@Blutvogt Is your airport open? Also, is your runway open/accepts small commercial flights?
GA flights worked before and passengers went through security as well. They wouldn’t do it if the airport is closed.
I checked the tutorial and my next task is to follow the boarding process.
I ran into the same problem. Flights were scheduled, the airport was open with runways and everything in place, but no aircraft landed. The flights showed as delayed on the operations tab. I saved and reloaded my game and received the same Warning message that @jeeringsole posted above. The flights still showed as delayed and would not land.
I submitted a bug report as the warning message requested.
Yes of course there are plenty of outstanding mods, I was talking only about default airlines and whatever got change with them. Maybe it will even effect mods, we do not know yet.