Can't get unity 2020 to build, don't understand the error message.

Unity Engine
1

Hello I’m trying to build my project for android in Unity 2020.1.0a3. I have had many errors while migrating but mos of them were easy to resolve, untill this current one which I don’t really understand.

UnityEditor.BuildPlayerWindow+BuildMethodException: 4 errors
  at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x00275] in <5bab1a3ac70c4024afd9bc9427b3a6a7>:0
  at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x00080] in <5bab1a3ac70c4024afd9bc9427b3a6a7>:0
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Was hopeing someone here could tell me what this is about.

Cheers

2

You should probably ask about problems with alpha pre-release versions of Unity in the appropriate forum.