What happens my Infinite Flight?
Check your internet connection. I see you have a red exclamation point, and that is probably why.
Strange, have you tried force closing the app?
Make sure it’s gone in the background, re-open and we will see from there
I’ve been forced to close the app, but still
(Translate from Google)
As mentioned before, it’s most likely an internet issue.
Try restarting your router and see if it makes any difference. If not, try to use cellular data instead of WiFi (if you were using cellular, then try using WiFi).