Issue #3025328 by babusaheb.vikas, Londova, andrey.troeglazov, malcolm_p,...

Issue #3025328 by babusaheb.vikas, Londova, andrey.troeglazov, malcolm_p, wundo, chrisolof: Error: Array to string conversion in Drupal\bootstrap\Plugin\Preprocess\

captcha.module

@@ -141,7 +141,7 @@ function template_preprocess_captcha(&$variables) {
       '#description' => $element['#description'],
       '#children' => Markup::create($captcha_children_output),
       '#attributes' => [
-        'id' => ['captcha'],
+        'id' => 'captcha',
         'class' => ['captcha'],
         'open' => [''],
       ],