[Bug] Unable to compare columns outside of pivots

[arabinelli]

Hi, I'm trying to create a % comparison for columns defined outside of the pivot field and the plug in is crashing as soon as the Measures > Comparison field is selected. This is the error I see in the developer console.

Uncaught TypeError: Cannot read properties of undefined (reading 'unit')
    at new g (report_table.js:9:87340)
    at m.createVarianceColumn (report_table.js:9:113100)
    at report_table.js:9:115600
    at Array.forEach (<anonymous>)
    at m.addVarianceColumns (report_table.js:9:115583)
    at new m (report_table.js:9:93133)
    at Object.updateAsync (report_table.js:9:171440)
    at t.<anonymous> (marketplace_viz_report_table::report_table-marketplace:33:58347)
    at marketplace_viz_report_table::report_table-marketplace:33:12803
    at Array.forEach (<anonymous>)

I'm not sure how to provide a reproducible example in Looker (apologies for that), but what I am trying to accomplish is to create a difference between two columns (e.g. col_A and col_B), where those columns can be defined as a summary of pivoted values - something along the lines of pivot_index(${col1},1) + pivot_index(${col1},3)