Patch attached.
asila96 → created an issue.
I'm having this same error on Drupal 9.5.10 with Webform Navigation 2.0.1 - happens on any form with multiple Wizard pages that uses AJAX. I'm allowing validation to be bypassed as users navigate between the pages. Really need to keep AJAX active since this form is supposed to display in a modal. Is there any version or patch that I can use right now? I did try 2.0.x-dev but that had the same issue.