Android Question [SOLVED]Error while running

[Almog]

Hello,

I am creating a game using Android bluetooth / Bluetooth admin Turorial, but when running the app, this error occurred:

Error
adb server version (39) doesn't match this client (40); killing...
could not read ok from ADB Server
* failed to start daemon
error: cannot connect to daemon

Does anybody know what is the problem and how to fix it?

Thanks in advance.

 

[Almog]

Solved.
I tried again and running suddenly worked without this error.