How to resolve "uncaught typeerror: cannot read property 'buffered' of undefined" error?

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ExtJS

Hello,
I got this error in my Ext JS application.
this error occurs because of the store not bind properly to grid in ext js.

how can I solve it?

Below is my code for store, view, controller and model

controller-

viewList: function () {

        var me = this;
        Ext.Ajax.request({
            url: 'WebService.asmx/getAllUser',
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },          
            scope: this,
            success: function (response) {
                var mydata = Ext.decode(response.responseText);
                var store = Ext.getStore('UserInfo');
                store.loadRawData(mydata);
                console.log(store);
            }
        });

        var form = new vDemo.view.userList({});

        this.tabPanel = new Ext.Panel({
            renderTo: 'conent',
            scope: this,
            layout: 'card',
            border: false,
            items: [this.form]

        });

    }

View is-

Ext.define('vDemo.view.userList', {
    extend: 'Ext.grid.Panel',
    alias: 'widget.userlist',
    title: 'All Users',

    // we no longer define the Users store in the `initComponent` method
    store: 'UsersInfo',
    collapsible: true,
    autoLoad: true,
   
    initComponent: function () {
    console.log("ok");


        this.columns = [
            { header: 'Name', dataIndex: 'firstName', flex: 1 },
            { header: 'Email', dataIndex: 'lastName', flex: 1 },
            { header: 'Email', dataIndex: 'email', flex: 1 }
        ];

        //Ext.apply(this, Ext.apply(this.initialConfig, config));
        this.callParent(arguments);
    }
});

And Model is-

Ext.define('vDemo.model.userm', {
    extend: 'Ext.data.Model',
    fields: ['userAutoId', 'firstName', 'lastName', 'email', 'DOB', 'userid', 'password', 'gender', 'bloodGroup', 'hieght', 'isDeleted']
});

I getting this error

Uncaught TypeError: Cannot read property 'buffered' of undefined

What I have tried:

I am trying to get store's data into grid view. I got the error as above.