Build Error when generating APK file

Hi all, I am in real need of help with a build issue. When I try to generate the apk file, it completes but with following logged errors:

FileNotFoundException: Could not load file or assembly 'UnityEditor.iOS.Extensions.Xcode, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies.
UnityEditor.HostView:OnGUI()

&

FileNotFoundException: Could not load file or assembly 'UnityEditor.iOS.Extensions.Xcode, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies.
Google.IOSResolver..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Google.IOSResolver
UnityEditor.HostView:OnGUI()​

Any assistance or guide would be appreciated.

Thanks

 

I had a similar issue and I found that reinstalling Unity with the iOS build tools included in the install fixed my problem as I now have UnityEditor.iOS.Extensions.dll on my machine.