Unable to list target platforms. I tried so many things based on other such posts but nothing changes!

I know this happens to many people and I keep trying what they did or the suggestions but here goes.

Android build on Windows 10 64 bit with unity 5.6.1f1.

Pop-up message when building:

"Unable to list target platforms. Please make sure the android sdk path is correct. See the console for more details. See the console for more details."

Then in the console 3 error messages (marked with for readability): - Error:Invalid command android

UnityEditor.HostView:OnGUI()

CommandInvokationFailure: Unable to list target platforms. Please make sure the android sdk path is correct. See the Console for more details. C:/Program Files/Java/jdk-9.0.1\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -

stderr[ Error:Invalid command android ] stdout[

] exit code: 64 UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.Android.AndroidSDKTools.RunCommandInternal (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.Android.AndroidSDKTools.RunCommandSafe (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.HostView:OnGUI()

Error building Player: CommandInvokationFailure: Unable to list target platforms. Please make sure the android sdk path is correct. See the Console for more details. C:/Program Files/Java/jdk-9.0.1\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -

stderr[ Error:Invalid command android ] stdout[

] exit code: 64

Now the things I have tried:

1) Update unity to version that is supposed to fix this. (Now I am on 5.6.1f1) 2) Install both 32 and 64 bit version of JDK. 3) I fully installed Android Studio and downloaded pretty much everything in their sdkmanager. 4) Changed the sdk location outside of the user/appdata/local/etc since it is a hidden folder (eventhough I unhid it) since I feared it might interrupt the process somehow. Now the SDK location is just in c:/ and ofcourse update the path in Unity (which finds it because if I select the wrong folder on purpose it won't close the the little pop-up browser) 5) Tried various versions of the command line tools since some people said that would help. 6) Many other random things that I can't even remember.

I've lost already 3 days on this. My project needs to go on. This is the first thing in a good 6 months I really got stuck where I can't reason my way out of it. All of the solutions are things that have worked for other people but nothing changes in mine.

Any help would really be appreciated!

Cheers,

Daan