Page heading null issue fixed

Author: magentoabu

app/code/Magento/Theme/view/frontend/templates/html/title.phtml

@@ -9,14 +9,18 @@
  */
 $cssClass = $block->getCssClass() ? ' ' . $block->getCssClass() : '';
 $titleHtml = '';
-if (trim($block->getPageHeading())) {
+
+$pageHeading = $block->getPageHeading() ? trim($block->getPageHeading()) : '';
+
+if ($pageHeading) {
     $titleHtml = '<span class="base" data-ui-id="page-title-wrapper" '
         . $block->getAddBaseAttribute()
         . '>'
-        . $block->escapeHtml($block->getPageHeading())
+        . $block->escapeHtml($pageHeading)
         . '</span>';
 }
 ?>
+
 <?php if ($titleHtml) : ?>
 <div class="page-title-wrapper<?= $block->escapeHtmlAttr($cssClass) ?>">
     <h1 class="page-title"
@@ -28,4 +32,4 @@ if (trim($block->getPageHeading())) {
     </h1>
     <?= $block->getChildHtml() ?>
 </div>
-<?php endif; ?>
+<?php endif; ?>