Can't build even a new empty project

Here are the errors below

I don't use any functionality of Vuforia. Vuforia check in the XR settings is disabled.

Spoiler: Error 1

TypeLoadException: Could not load type 'BuildObserver' from assembly 'Vuforia.UnityExtensions.Editor, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.
System.MonoType.GetConstructors (BindingFlags bindingAttr) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/MonoType.cs:134)
System.MonoType.GetConstructorImpl (BindingFlags bindingAttr, System.Reflection.Binder binder, CallingConventions callConvention, System.Type[] types, System.Reflection.ParameterModifier[] modifiers) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/MonoType.cs:95)
System.Type.GetConstructor (BindingFlags bindingAttr, System.Reflection.Binder binder, CallingConventions callConvention, System.Type[] types, System.Reflection.ParameterModifier[] modifiers) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Type.cs:1007)
System.MonoType.GetDefaultConstructor () (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/MonoType.cs:75)
System.Activator.CreateInstance (System.Type type, Boolean nonPublic) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Activator.cs:354)
System.Activator.CreateInstance (System.Type type) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Activator.cs:254)
UnityEditor.Build.BuildPipelineInterfaces.InitializeBuildCallbacks (BuildCallbacks findFlags) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildPipelineInterfaces.cs:117)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)

Spoiler: Error 2

Error building Player: TypeLoadException: Could not load type 'BuildObserver' from assembly 'Vuforia.UnityExtensions.Editor, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.

Spoiler: Error 3

Build completed with a result of 'Failed'
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)

Spoiler: Error 4

UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x0021f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:182
at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x00065] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:89
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)

 

Here is a page that explains how UT wants us to report bugs:
https://unity3d.com/unity/qa/bug-reporting

PS: Leonhard, it would probably be a good idea to always link to that page if you paste your "could you please submit..." text

 

I reported the bug with id #986741

I also saw this other thread : https://forum.unity.com/threads/vuforia-does-not-work-in-unity-2018-1-0b2.512044/

My issue is probably related to that. Is there a way to just uninstall the Vuforia module from my unity beta installation? I don't want to download lots of gb of data again. It takes too much time and data limit on my connection.