adb server version (41) doesn't match this client (39)

Question

im using OS ubuntu and im not using GenyMobile. terminal

Answer 1

I did my digging for a while as the accepted answer did not work and landed on this solution [I am on Ubuntu 20.04.2 LTS]

What is causing it to happen?
A clash between two different adb in the system. One in android/sdk/platform-tools and another in usr/bin

What will we do?
delete the adb located in usr/bin, then copy from platform-tools and paste in the usr/bin

Steps:

1. open the usr/bin in terminal as:

sudo nautilus

2. locate and delete adb in usr/bin
3. open sdk/platform-tools, copy paste adb to above usr/bin
4. lastly perform this in terminal:

sudo apt update && sudo apt install android-sdk