I just landed at the Frankfurt Airport and I just realized that the terminals are missing is a failure of my phone or since the last update has been like this
Try clearing the scenery cache. I hope this helps.
Have you tried clearing the cache?
Go to Settings —> General —> Tap “Clear scenery cache”. It’s in the bottom.
There isn’t an error here. When airport editors edit airports you will no longer see terminal(s) drawn, this is a new standard. You will only see hangar floors.
Edit: per Moritz
Hangars will be drawn in concrete.
Buildings are no longer allowed in airport layouts
That’s actually incorrect, hangars will always be concrete