You should see what the problem is by scrolling to the top of the exception data that is posted to your output panel.
Generally, guessing without seeing your output, when you get this from clicking a button, it is because something is not linked correctly like the action or outlet.
I tried to change the name of the file last night. Realized I don’t yet know how to do that and the project work across the board. I thought I changed all instances, but this area here is where I found that it was referencing the old name in the “Module” field. Once I changed it back to the original, it was able to build and all taps work!