Invalid PBX Project when building for IOS

When building for IOS I get the message: "Exception: Invalid PBX project (parsing line 883)"

I have imported the package for Vuforia (the latest version) and am using the latest version of Unity as well, though I've tried with the past few releases of Unity and none of them are working with it. The problem doesn't occur when Vuforia is not in the project but I need to use it.

Any tips?