Android license problem

I am getting this error, even when i´m trying to start a sketch on my device:

Caused by: java.lang.RuntimeException: You have not accepted the license agreements of the following SDK components:
[Android SDK Build-Tools 26.0.2].
Before building your project, you need to accept the license agreements and complete the installation of the missing components using the Android Studio SDK Manager.

Also, i dont know, how to accept the license agreement.

When you installed the android mode, did you install it as Processing offered to download the SDK, or did you install it manually? Because right after downloading a dialog box appears asking for agreement. It happened once to me and I deleted the SDK folder and installed the mode again. I know in AS there is a way to accept it in the command line, but I don’t know for Processing.

i uninstalled it again, now im gonna show you:

thats all

Are you using windows?
In your explorer can you locate a folder “Android” in the folder “Documents”? It must contain another folder named SDK.