Galaxy S9 install on Linux+Windows: tip to un-block install process

On linux (and Windows), with a Samsung Galaxy S9, the install process is stuck / blocked at the step “Apply Update from ADB”

I have found a workaround!

On Linux, I ran the following command on the command line:

adb devices

Then it seems that this command “un-block” the screen and the install process (sideload) continues with success.

I hope it will help some people installing e/OS !