Fixing the multidimensional array as value for the widget's parameter

Author: eduard13

app/code/Magento/Widget/Block/Adminhtml/Widget/Options.php

@@ -166,7 +166,9 @@ protected function _addField($parameter)
 
         if (is_array($data['value'])) {
             foreach ($data['value'] as &$value) {
-                $value = html_entity_decode($value);
+                if (!is_array($value)) {
+                    $value = html_entity_decode($value);
+                }
             }
         } else {
             $data['value'] = html_entity_decode($data['value']);

lib/internal/Magento/Framework/Data/Form/Element/Label.php

@@ -37,8 +37,14 @@ public function __construct(
     public function getElementHtml()
     {
         $html = $this->getBold() ? '<div class="control-value special">' : '<div class="control-value">';
-        $html .= $this->getEscapedValue() . '</div>';
+        if (is_array($this->getValue())) {
+            $html .= '</div>';
+        } else {
+            $html .= $this->getEscapedValue() . '</div>';
+        }
+
         $html .= $this->getAfterElementHtml();
+
         return $html;
     }
 }