Installation failed with message Failed to establish session.

Fix way

The reason for this error is that I configured the adb environment. If there is no configuration of adb, but also reported this error, indicating that adb is occupied, with this command:

adb kill server

If MIUI, there is a ‘open MIUI optimization’ in developer option, just close it!

Reference : http://www.fatalerrors.org/a/installation-failed-with-message-failed-to-establish-session.html