I have created a custom contact form and I have set up an ajax inline validation. My form works very well. But Ajax validation only works when I am connected. When I am not logged in as an administrator, ajax validation does not work.

Also I created a block to display the form in my footer. This form does not appear when I am logged in as an administrator. When I am connected I have access to the form only through the path I defined in module.routing.yml. And when it appears (so when I'm not logged in and I'm just a visitor), Ajax doesn't work on this block form either.

Does anyone have any idea what could cause this? Please help me.

2 Answers 2


These kind of errors often happen when you have not attached the proper library to your form. So one thing to check is if you have $form['#attached']['library'][] = 'core/drupal.dialog.ajax'; in your form's buildForm().

  • Hi @theuni. Indeed I hadn't attached the library. But I just did, I still have the same problem. Commented Aug 8, 2019 at 8:06
  • could you show some of the code?
    – theuni
    Commented Aug 8, 2019 at 10:45
  • I added the code here stackoverflow.com/questions/57401648/… Commented Aug 8, 2019 at 12:02
  • given that the library is now added to the code you postet it looks ok. have you cleared cache?
    – theuni
    Commented Aug 8, 2019 at 12:20
  • Yes @theuni, I cleared the cache. I was also convinced it would work when I saw your answer. But it still doesn't work. Commented Aug 8, 2019 at 12:40

I finally found the solution on the Drupal forum. I put it here, maybe it will help in the future a novice who will be in my case.

What was missing was simply a list of essential javascripts for anonymous users. It seems that at one time it wasn't necessary, but now we have to add them otherwise they wouldn't be loaded for anonymous users.

So what I needed to do was add this to my theme.libraries.yml file

  version: VERSION
    js/scripts.js: {}
    - core/jquery
    - core/drupal.ajax
    - core/drupal
    - core/drupalSettings
    - core/jquery.once

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