AJAX callbacks in the Entityqueue "Add Entityqueue Form" not working with Drupal 10.3.x

Problem/Motivation

In the "Add Entityqueue Form" provided by the Entityqueue module, selecting an option fails to trigger the expected AJAX callbacks. Consequently, dependent fields are not updated dynamically, preventing users from correctly configuring new entity queues.

This issue appears to be caused by changes in AJAX handling introduced in Drupal 10.3.x, the Entityqueue module may also have incompatibilities in how it interacts with these Ajax callbacks.

Steps to reproduce

1. Install and enable the Entityqueue module on a Drupal 10.3.x site.
2. Navigate to the form to add a new entity queue (/admin/structure/entityqueue/add).
3. Select an option from a dropdown or another AJAX-enabled field.
4. Observe that no AJAX request is made, and dependent fields remain unchanged.

Remaining tasks

• Confirm the root cause of the AJAX failure by analyzing the browser console, PHP error logs, and AJAX response payloads.
• Update the module code to fix compatibility issues.
• Test the fix on a Drupal 10.3.x site to ensure it resolves the issue without introducing regressions.

User interface changes

N/A

API changes

N/A

Data model changes

N/A