The tree is not rendered, nothing happens.

[DrYurets]

Hello. Please tell me why I can’t connect the plugin in Yii2.

• Plugin version 1.8.2
• jQuery v3.6.4

There are no errors in the console, but the tree is not rendered, just an empty div element. I included the CSS styles file, and also included the jquery.mockjax.js plugin just in case

<div id="tree1" class="tree"></div>

let treeData = [
        {
            name: "node1",
            children: [
                { name: "child1" },
                { name: "child2" }
            ]
        },
        {
            name: "node2",
            children: [
                { name: "child3" }
            ]
        }
    ],
    treeElement = $("#tree1");
        
   if ( $.isFunction($.fn.tree) ) console.log("tree is a function");
   if (treeElement.length) console.log("tree element found");
   
   treeElement.tree({
       data: treeData,
       autoOpen: true,
       dragAndDrop: true
   });
   
   treeElement.on(
    "tree.loading_data",
    function(e) {
        console.log(e.isLoading, e.node);
    }
);

What could be wrong?