What could be causing this Error

tongai

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading '0')
at __column_header (dataTables.mjs:8676:1)
at _Api.<anonymous> (dataTables.mjs:8907:1)
at _Api.iterator (dataTables.mjs:7132:1)
at _Api.<anonymous> (dataTables.mjs:8906:1)
at _Api.<anonymous> (dataTables.mjs:7350:1)
at _Api.header (dataTables.mjs:7222:1)
at _Api.<anonymous> (dataTables.responsive.mjs:534:1)
at _Api.map (<anonymous>)
at _Api.map (dataTables.mjs:7159:1)
at Responsive._classLogic (dataTables.responsive.mjs:532:1)

allan

Possibly an incorrect column count between the JS configuration and HTML? Or perhaps invalid HTML?

I'm not immediately sure beyond that, which is why the template text for new posts requests a test case for all posts, as do the forum rules.

Please see this tech note for how to provide a test case if you can't link to your page.

Allan