This stand is not connected to a security checkpoint?

Hello , could you help me ? I Try to get planes to my airport but it show that "This stand is not connected to a security checkpoint " What should i do ?
Screens : https://ctrlv.cz/7p8u
https://ctrlv.cz/qdFt

That looks like a virus

Is Security set on OPEN in Operations?

As @jasperwillem said, is security set to OPEN, and have you opened the stand itself? :slight_smile: