This is an error that occurs when the app cannot make a consistent connection via UDP, which is how the gameplay state is transmitted from the server to your device.
This is an error generated on the client, which means that there's something in between you and our servers that is preventing a consistent UDP connection from being made. This could be your carrier, your networking equipment (WiFi, router, ISP, you're trying to play Armajet on a plane, etc.), a squirrel nibbling a fiber optic cable or many other things.
We've noticed that the Beta client has this issue with T-Mobile and it's carriers. We are working on resolving this issue with some brand new netcode but there is not currently a release window. If you use T-Mobile and you cannot connect, please be patient with us as we develop and test!
We encourage you to send us a message if you encounter this error with what device you're using, OS+version, and how you're connecting -- WiFi or carrier (and which one), what type of router you're using if you're on WiFi, etc. There is probably not much we can do to fix this from our end, but it may help us optimize in the future. In the mean time, try to play on a different connection if you can!