There was an error with communicating with your device in Xcode

I searched all resources last day and didn't get a successful result. Please take it into consideration that I could test with this device a few days ago. But today I didn't do. Also I tested this iPhone with another mac, the result is the same. The device is an iPhone 6s. I did the following things: -restart Xcode -restart mac -restart device -clean& build project

Please help me for solving this problem.

1: You can see error's picture from here

What is Xcode error?

If you run your app and you get some build errors, that means Xcode has detected that the syntax of your code is wrong. If Xcode is complaining that a specific identifier doesn't exist, then check that all of your opening curly braces have corresponding closing curly braces.

I had the same problem and I restarted my iPhone. Now it's working.

Problem was due to device OS version.I just updated device version to 11.0 and restared device.Then problem solved.Hope this comment will help to someone