Notice: Undefined property view::$row_index in views_handler_field->advanced_render()

What version of PHP are you using? Did you only see the log message after you updated to 3.29, or has it been more recent than that? Have you debugged your way down to see what field was being rendered?

Hi Damien,

Thank you for your reply. I'm using php version 7.4. This is recent, it started with the latest update since March (3.29).
I cannot jump to php 8.x still, there are a few modules that will only work under7.x.

Many thanks,
Miguel