InvalidOperationException - Could not find an element

Getting this error when I completely close out of the SalesTable form, trying to get back to the DefaultDashboard homepage.

Looks like it may be trying to open a 'BudgetWorkspaces' menu item, at least according to the comment under the catch.

I did add an extension class for the SalesTable form. The method extends the canClose() on the SalesTable form. The code in the debugger goes through the canClose() all right, but then errors out on the close() method on the SalesTable form.

The logic on the canClose() method was from a model imported into a D365 environment and was created in a 2012 environment. Not sure why the DefaultDashboard is erroring out. If I navigate to a different form from SalesTable, the other form opens fine.

Any advice or suggestions would be greatly appreciated.