ACP2E-1703 : Category URL rewrites cannot be created for categories under level 3

Author: lakshmana

app/code/Magento/UrlRewrite/view/adminhtml/templates/categories.phtml

@@ -5,17 +5,18 @@
  */
 
 /** @var \Magento\UrlRewrite\Block\Catalog\Category\Tree $block */
+$root = $block->getRoot(null, 0)
 ?>
     <fieldset class="admin__fieldset" data-ui-id="category-selector">
         <legend class="admin__legend"><span><?= $block->escapeHtml(__('Select Category')) ?></span></legend>
         <div class="content content-category-tree">
             <input type="hidden" name="categories" id="product_categories" value=""/>
-            <?php if ($block->getRoot()) : ?>
+            <?php if ($root) : ?>
                 <div class="jstree-default"></div>
             <?php endif; ?>
         </div>
     </fieldset>
-<?php if ($block->getRoot()) : ?>
+<?php if ($root) : ?>
     <script type="text/x-magento-init">
     {
         ".jstree-default": {