TypeError count() on click into the Format settings

I found that this occurs because core's layout_builder_blank is passing a null value.

It might be considered a core bug.

Implements core solution to remove blank layout from options.

still get this issue, the error removed with this

    foreach ($this->regions as $plugin_id => $region) {
      $default_values = $this->options['layout_name'] == $plugin_id ? $this->options['layout_regions'][$plugin_id] : [];
      if (empty($region['regions'])) {
        continue;
      }

inside buildOptionsForm() method

Musa.thomas → , could you provide more context? What specific error are you getting with #3's commit (1280ddb0)? Why is your empty condition targeting the ['regions'] key?

@jcandan i get the same error as report inside #1 also I saw that the checboxes form element use "
'#options' => $region['regions']," so iIjust add the empty condition to avoid error. I juste need to fix quickly i didn't debug deeply sorry.

This error still exist making the usage of the module impossible :
An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /admin/structure/views/ajax/display/layout_content/block_1/style_options
StatusText: parsererror
ResponseText: TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in count() (line 64 of .../web/core/lib/Drupal/Core/Render/Element/Checkboxes.php)."

is it related to this issue : https://www.drupal.org/project/drupal/issues/3252288 🐛 Argument #1 ($value) must be of type Countable|array, null given in count() (line 57 of core/lib/Drupal/Core/Render/Element/Radios.php). Needs work