Describe the bug
Open the https://codesandbox.io/s/quizzical-gagarin-z92ypd
check the console

Describe the bug
The package.json file of the @progress/kendo-vue-listbox package doesn't have the following definition:

"exports": {
    "node": "./dist/esm/main.js",
    "import": "./dist/es/main.js",
    "require": "./dist/npm/main.js",
    "default": "./dist/npm/main.js"
}

To Reproduce

1. Open this link
2. Open the "package.json" file

Expected behavior
The package.json file of the @progress/kendo-vue-listbox package should have the described above definition.

Describe the bug
The Drag and Drop functionality of the ListBox doesn't work when one of its lists is empty.

To Reproduce

1. Open this StackBlitz example
2. Move all ListBox items to the column on the left
3. Try to move an item from the left column to the right one

Expected behavior
The users should be able to drag and drop the ListBox items no matter if its lists are empty or not