Facebook Build Errors

I seem to be having hundreds of errors, all of them being 1 of 2 different types of errors. When I try to build for Facebook Gameroom, 806 errors pop up:

 FormatException: Input string was not in the correct format
 System.Int64.Parse (System.String s) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Int64.cs:458)
 System.Convert.ToInt64 (System.String value) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Convert.cs:1404)
 Google.VersionHandler+FileMetadata.CalculateVersion (System.String versionString)
 Google.VersionHandler+FileMetadata.CalculateVersion ()
 Google.VersionHandler+FileMetadataByVersion.Add (Google.FileMetadata metadata)
 Google.VersionHandler+FileMetadataSet.Add (Google.FileMetadata metadata)
 Google.VersionHandler+FileMetadataSet.ParseFromFilenames (System.String[] filenames)
 Google.VersionHandler.UpdateVersionedAssets (Boolean forceUpdate)
 Google.VersionHandler..cctor ()
 Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Google.VersionHandler
 Facebook.Unity.Editor.AndroidSupportLibraryResolver.setupDependencies ()
 Facebook.Unity.Editor.AndroidSupportLibraryResolver..cctor ()
 Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
 System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:519)
 System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:528)
 System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/ConstructorInfo.cs:77)
 System.Activator.CreateInstance (System.Type type, Boolean nonPublic) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Activator.cs:372)
 System.Activator.CreateInstance (System.Type type) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Activator.cs:254)
 UnityEditor.AssetPostprocessingInternal.GetAudioProcessorVersions () (at C:/buildslave/unity/build/Editor/Mono/AssetPostprocessor.cs:339)
 UnityEditor.HostView:OnGUI()

Following this, nearly every script in the project complain that no single namespace can be found. There are hundreds of these errors:

 Assets/Plugins/AdColony.cs(45,25): error CS0246: The type or namespace name `MonoBehaviour' could not be found. Are you missing an assembly reference?

Anyone might know a solution to this?

Thank you