Bizarre Missing Assembly 'Common' Error

Hi, recently I’ve merged with VCS our project with a coworker, who i think added Unity IAP for iOS (since he has a Mac) to our game, and since then i’ve been getting weird assembly error each time I change a scene, it lets me play the game in the Editor, but does not let me compile an .apk for Android.

FileNotFoundException: Could not load file or assembly ‘Common, Version=1.0.6148.29088, Culture=neutral, PublicKeyToken=null’ or one of its dependencies.
UnityEngine.Purchasing.UnityPurchasingEditor.m__0 () (at <6c548948af5a461b93ba50e09e548bbd>:0)
UnityEditor.EditorApplication.Internal_CallDelayFunctions () (at C:/buildslave/unity/build/Editor/Mono/EditorApplication.cs:118)
Also sometimes these errors on random (I don’t know if they are connected, but seems to include something with purchases as well

Unloading broken assembly Assets/Plugins/UnityPurchasing/Bin/Apple/Apple.dll, this assembly can cause crashes in the runtimeUnloading broken assembly Assets/Plugins/UnityPurchasing/Bin/Tizen/Tizen.dll, this assembly can cause crashes in the runtimeExecutionEngineException: MonoError reused after mono_error_cleanup
System.Reflection.Assembly.GetTypes () (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/Assembly.cs:406)
UnityEditor.AssemblyHelper.GetTypesFromAssembly (System.Reflection.Assembly assembly) (at C:/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:333)
UnityEditor.EditorAssemblies.ProcessInitializeOnLoadAttributes () (at C:/buildslave/unity/build/Editor/Mono/EditorAssemblies.cs:157)
UnityEditor.EditorAssemblies:ProcessInitializeOnLoadAttributes()
Very weird problems that I can’t find answers to and not much that i understand to be honest. I tried removing Plugins/UnityPurchasing, but of course we need it to make the iOS purchasing part work. i also set .NET 2 (not subnet) in PlayerSettings, also reimports, recloning projects etc. nothing helped. Any ideas guyz?

Hi! It was long time ago when you post this issue but have you find any solution? We are stucked in here as you were. Thanks in advance.