Error: Running app on Android

[ThiagoM]

Hey Guys, with much effort I got to "run" the app without error, that was I expected. Because, nothing shows up!

I have this error when use debug:

The command "/home/multipla/Android/Sdk/platform-tools/adb" terminated with exit code 1.
adb: error: listener 'tcp:5039' not found
The command "/home/multipla/Android/Sdk/platform-tools/adb" terminated with exit code 1.
adb: error: listener 'tcp:34291' not found

Command line:

~/Android/Sdk/platform-tools$ ./adb devices
List of devices attached
9ffffebc7d42	device

I do not get to run my app on my smartphone. Dev Mode is ON

Ubuntu 18.04.3 LTS
Qt Creator 4.11.0
(SDK Version: 26.1.1, NDK Version: 19.2.5345600)