Multiple precompiled assemblies with the same name UnityEditor.Android.Extensions.dll included

Can anyone help me?, I've been trying super hard to android support working for Unity 2019.3.13, I've tried Android Support tools of previous version and they all showed the error "JDK is not set or invalid". Now I finally fixed that by installing Unity-2018.4.23f1 LTS Android tools and that fixed the problem. Now another problem came, that's "
: Multiple precompiled assemblies with the same name UnityEditor.Android.Extensions.dll included or the current platform. Only one assembly with the same name is allowed per platform. Assembly paths:
D:/Unity 2/Unity/Editor/Data/PlaybackEngines/AndroidPlayer/UnityEditor.Android.Extensions.dll
D:/Unity 2/Unity/Editor/Data/PlaybackEngines/AndroidPlayer/UnityEditor.Android.Extensions.dll"
I checked the folder and there's only one of them. There isn't another. Can anyone please help me? Would really appreciate it.