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

Problem/Motivation

As the Varbase core uses the entityqueue module then 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

• ✅ File an issue about this project
• ❌ Addition/Change/Update/Fix to this project
• ❌ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ❌ Code review from 1 Varbase core team member
• ❌ Full testing and approval
• ❌ Credit contributors
• ❌ Review with the product owner
• ❌ Update Release Notes and Update Helper on new feature change/addition
• ❌ Release

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• N/A