Ajax error with version jQuery 1.5

I went temporarily insane trying to figure out why all of my file fields (extra fields on content types to upload a file) were broken, and reported an Ajax parsererror similar to the one above whenever anyone tried to upload a file.

I'm glad someone posted this bug report; I would never have thought to check different jQuery versions.

It turns out, it was caused by the latest DrupalChat update. I went from beta 27 to beta 29 I think.

It can be fixed by installing the jQuery Update module and telling it to use jQuery v1.8

I think it is because DrupalChat is interfering with any other AJAX code on the site; any time there is an Ajax query, DrupalChat noses in and messes it up.

This is really strange. Which polling method are you using? Thanks.

DrupalChat doesn't modify any other AJAX call apart from it's own. Please re-open this if the issue still exists.

Thanks,
Shashwat

I confirm - ajax doesn't work when jquery 1.5. and drupalchat are enabled. We use "iFlyChat server" as polling method.

I have this issue too. I'm using drupalchat 7.x-1.4, iFlyChat server for polling, jquery version 1.5 for admin pages and 1.10 for the front-end pages. On a node/add/post form, clicking "Add another item" ajax button throws an error:

An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /drupal/system/ajax
StatusText: parsererror
ResponseText: [{"command":"settings","settings":{"basePath":"\/drupal\/","pathPrefix":"","ajaxPageState":{"theme":"seven_custom","theme_token":"foecIvNSbzQo2a1btdRk3OvJKqEKZ-9qe0Xyu5NVkEc"

If in the drupalchat config visibility settings, I exclude
node/add/*
node/edit/*
the node form loads without chat as expected, then "Add another item" works the first time. However, after that first time, the Chat window shows up again (even though I haven't navigated away from the node edit page, and if I click "Add another item" a second time, I get the ajax error again.

If I change jquery update for admin pages to 1.7, the problem seems to go away.

I am looking for help: This is a search. I am trying to get data from my nodes by searching the title. I can't get it to work. Please anybody can give me some ideas.. Thank you for your time.

I can see the value but I can't display the results. "node_title" and the value = "anyvalue"

mymodule/src/form

MyModule.php

public function buildForm(array $form, FormStateInterface $form_state){
$form['#prefix'] = '

';
$form['#prefix'] = '

';
$form['#attached']['library'][] = 'core/drupal.dialog.ajax';
$form['node_title'] = [
'#type' => 'textfield',
'#title' => $this->t('Node\'s title'),
'#description' => $this->t('Enter a portion of the title to search for'),
];
$form['actions']['#type'] = 'actions';
$form['actions']['submit'] = array(
'#type' => 'submit',
'#value' => $this->t('Search'),
'#ajax' => array( // Ajax callback where we will process
'callback' => '::promptCallback',
// the data came from the form and that we will receive//)
),
);
$form['#title'] = 'Search by Title';
return $form;
}

public function promptCallback(&$form, FormStateInterface $formState){

$node_title = $formState->getValue('node_title');

$query = \Drupal::entityQuery('node');
$query->condition('status', 1);
// $query->condition('title', '%'.$node_title.'%', 'like');
$query->condition('title', $node_title, 'CONTAINS');
$query->condition('type', 'income_poverty');
$entity = $query->execute();

$key = array_keys($entity);
$id = !empty($key[0]) ? $key[0] : NULL;
$response = new AjaxResponse();
if ($id !== NULL) {

foreach($id as $value) {
$content = 'Title does not exists

' . $value . '

';
$response->addCommand(new HtmlCommand('#search-result1', $content));
}

} else {
$content = 'Title does exists

' . $node_title . '

';
$response->addCommand(new HtmlCommand('#search-result2', $content));
return $response;

}

mymodulesearch.routing.yml

mymodulesearch.modal:
path: '/mymodulesearch/data'
defaults:
_form: '\Drupal\mymodulesearch\Form\MyModule'
requirements:
_access: 'TRUE'

Here is the error, similar above:

AjaxError:
An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /mymodule/data?ajax_form=1
StatusText: OK
ResponseText: TypeError: Argument 1 passed to Drupal\Core\Render\MainContent\AjaxRenderer::renderResponse() must be of the type array, null given, called in /Users/me/Sites/devfolder/d8.5.3/core/lib/Drupal/Core/Form/FormAjaxResponseBuilder.php on line 89 in Drupal\Core\Render\MainContent\AjaxRenderer->renderResponse() (line 45 of /Users/me/Sites/devfolder/d8.5.3/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php).