I am currently debugging a WP install with lots of plugins and Avada theme (Fusion core, Fusion Builder)
The thing is I can't edit the current Menu. When I select an item and add it, the spinner pops, unpops, and nothing more happens actually.
I digged a little and tried to delete all terms and taxonomies in database but now. I can't create nav-menu because it is created with term_id 0.
Even with wp-cli, wp create menu 'test' says :
Success: Created menu 0. with each new invocation of the command with different menu names.
What is wrong? Anyone has tips to reinitialize menu datas ?