I have a simple Merge query with two rules. When running it, all the results are fine but when I try to Pivot the results by one of the dimensions, I get an error in the console:
I think I also ran into this on 24.10.25 yesterday (Monday, July 1). Existing pivoted merged tables are fine, but if I try to build a new one, nothing happens when I click to pivot. I also observed errors in the console, but no errors within Looker itself.