Why my player settings is disabled? Unity 5.6.1

Hi,
I’m new to unity, and I have problem with my player settings.
I have existing project, and the player settings is disabled. All of the settings. inlcuding andorid ios…
Why is this disabled? how can I change the settigns in it?

By the way, I have other projects that do have player settings enabled. this is happen only in this project.

@RonLevi555 , I’m not very sure why you are getting such error but try.

  1. Restart Unity.
  2. Head over to File–> Build Settings.
  3. Make sure there are scenes ready to be built and check if they are marked or ticked.
  4. Click player settings.
  5. Go to Edit–>Project Settings–>Player and see if it works.

@bolkay, this is did’nt worked.
by the way, I have other unity project that do have player settings enabled. this is only in this unity project.

You should first make sure that you can actually build an apk. So first download the android sdk, Unity Android support and such.
I’m very sure that when you are able to create an apk, you will be able to change these settings as well.