custom (block) module - text_format not rendered

Hello all,

I am trying to develop a custom module. It is working fine but...

I want to add a text_format field in block configuration form:

    $form['partners_text'] = array(
      '#type' => 'text_format',
      '#title' => t('Partners text'),
      '#default_value' => $config['partners_text'],
      '#format' => NULL,
      '#description' => t('Text to put in partners tab.'),
      '#required' => TRUE,

There is no validation (yet) of the form fields.

This is my template snippet for this block:

{#
/**
 * @file
 * Theme for Partners Feed block.
 *
 * Available variables:
 * - text:
 * - more_link:
 * - more_text:
 *
 * @ingroup themeable
 */
#}
<div class="container-fluid">
  <div class="row">
    <div class="col-md12">{{ text|raw }}</div>
  </div>
  <div class="row">
    <div class="tab-footer"><span><a target="_blank" href="{{ more_link }}" class="more-link">{{ more_text }}</a></span></div>
  </div>
</div>

The variable text is not rendered and