fix: Update error message output to remove unnecessary HTML escaping

#10415

Author: Daniel Neto

view/img/image403.php

@@ -68,7 +68,7 @@
         </g>
     </svg>
     <?php
-    echo htmlspecialchars($_REQUEST['403ErrorMsg'] ?? '', ENT_QUOTES, 'UTF-8');
+    echo $_REQUEST['403ErrorMsg'] ?? '';
     ?>
 </div>
 <script>