The full error message is: Error: Call to undefined function title_taxonomy_allowed_values() in taxonomy_options_list() (line 1430 of /home/admin/public_html/backdrop/core/modules/taxonomy/taxonomy.module). It is a fatal error.

This happens when I try to edit much, if not all, of my content that contains taxonomy ref fields. This is a migration from Drupal 7. I was using the title module in D7 but I can't figure or find how the taxonomy module wants to call this undefined function. Thanks for any help.


That did indeed fix my problem. Thank-you very much for responding.