Even the smallest strip with no parking spots at all will work, you just need to check that the phase of flight the sim expects you to be in. I cited one example before where this is easily broken, with an airstrip with two runways.
If you have the top menu option open to view the status of flight, you land, taxi off the runway, you should see the menu change to shut down engines. If you happen to be at one of those strips where there are intersecting runways, and you cross one of these, the sim will think you want to take off again. Now it won’t matter if you even find a parking spot, as a shut down won’t trigger the end of flight pop-up, as it expects you to take off.
What the sim thinks you are doing is critical, though it really shouldn’t be.
In case anyone is interested, I tried to log all the various states of a flight a while back.