Null exception when running in the Editor

I've just updated a second project to use Vuforia, the first one I did is now working ok after a number of issues but upgrading to Vuforia 7.5.26 sorted 99% of them.
However in the second project which has the same codebase just different assets when I run it in the Editor I get the following error

First the emulator database fails

Then this error happens and I can't test in the editor

Why would it work in one project but throw this error in another?

I should add that it works on the iPad once compiled, it's only an issue in the Editor

 

Ok I've found the solution.
Although I exported my AR scene from the working project into an Asset bundle and imported into the new one this doesn't seem to be enough to load everything needed to get it working.
I had to also add a second AR camera to my new project to get everything to initialise and then remove it again.
After doing that the database seems to be built and ok and all the errors disappear.