I Broke The Landing Page Grid

So, I was going to add a column to the landing page grid in UD100. But instead of adding a column in the Data/Grid Model, I added it under Advanced/View Options. Then I deleted it back out and added columns in the right place.

After that, when I open the app, I get this:
image

It spins until I click on one of the column headers:

I can’t see anything different between the UD100 landing page grid and a UD105 landing page grid that doesn’t have any changes, other than the columns I’ve added under the Grid Model since.

I surely hate to go to a backup and recreate a bunch of changes. Any ideas?

And how the heck could I copy/save as a layer to use as a reference to recreate this one?

Thanks,

Joe