Can't change callsign

I can’t change my callsign. This is all that pops up.

Try restarting your device. Sometimes that dose for bugs like these.
And if that doesn’t work you can redownload Infinite Flight, just make sure its on internet so it downloads correctly.

i’m currently the same issue but i’m on bluestacks X, so that might be the problem

Topic is a month old with no response from the OP. If anyone experiences this, please post a new support topic with as many details as possible. Thank you kindly :)