image

if ($message_owner->user_picture && !$message_owner->user_picture->isEmpty()) {
 $render_array = [
   '#theme' => 'image_style',
   '#style_name' => 'privatemsg_avatar',
   '#uri' => $message_owner->user_picture->entity->getFileUri(),
   '#alt' => $message_owner->getDisplayName()

$field_config = FieldConfig::loadByName('user', 'user', 'user_picture');
if ($field_config) {
  $default_value = $field_config->getSetting('default_image');
  if (!empty($default_value) && !empty($default_value['uuid'])) {
    $file = \Drupa

Install imagick module and enable it as default image toolkit.

Add custom code: