The whole Google+ service is being shut down in a few months, and due to this also the AirwaySim Google+ page will cease operations. New updates will not be posted there anymore from now on.
Please follow us in FB or Twitter instead:
https://www.facebook.com/AirwaySim
https://twitter.com/AirwaySim
The social login using Google account will continue to work normally.
Further reading: https://www.theverge.com/2018/12/10/18134541/google-plus-privacy-api-data-leak-developers