From 21eae60f1a8b937d7dca840781375c5188a4c501 Mon Sep 17 00:00:00 2001
From: Vladimir Roudakov <44088-VladimirAus@users.noreply.drupalcode.org>
Date: Mon, 20 Feb 2023 23:44:57 +1000
Subject: [PATCH] Issue #3343165: TypeError: array_keys(): Argument #1 ($array)
 must be of type array, null given in array_keys() (line 545 of
 core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php)

---
 src/Service/BlockClassHelperService.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Service/BlockClassHelperService.php b/src/Service/BlockClassHelperService.php
index 479bdce..f008467 100644
--- a/src/Service/BlockClassHelperService.php
+++ b/src/Service/BlockClassHelperService.php
@@ -932,7 +932,7 @@ class BlockClassHelperService {
   public function validateDynamicClasses(&$form, &$form_state, $config) {
 
     // Get the ThirdPartySettings.
-    $third_party_settings = $form_state->getValue('class')['third_party_settings'];
+    $third_party_settings = $form_state->getValue('class') ? $form_state->getValue('class')['third_party_settings'] : [];
 
     // Verify if there is attributes enabled.
     if (!empty($form_state->getValue('attributes')['third_party_settings'])) {
-- 
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