Errror generated in console leading to block validation failer

Question

Within my custom block plugin, I am using create-block to generate my block environment for block editing. Within my `src/edit.js file I have the following setup...

import { __ } from '@wordpress/i18n';
import {
    useBlockProps,
    Fragment,
    RichText,
    BlockControls,
} from '@wordpress/block-editor';
import './editor.scss';

export default function Edit( { attributes, setAttributes } ) {
    const { text } = attributes;

    // additional options for our RichText component - https://github.com/WordPress/gutenberg/blob/HEAD/packages/block-editor/src/components/rich-text/README.md
    return (
        <Fragment>
            <BlockControls controls={[{
                title: "Button 1",
                icon: "admin-generic",
                onClick : () => console.log("Button 1 clicked!"),
            },]} />
            <RichText
                { ...useBlockProps() }
                onChange={ ( value ) => setAttributes( { text: value } ) }
                value={ text }
                placeholder={ __( 'My chocolate placeholder', 'chocolate' ) }
                tagName="h4"
                allowedFormats={ 'core/bold' }
            />
        </Fragment>
    );
}

...But when I run npm start, and go to my edit page, I get the following error in the console...

Block validation: Block validation failed for `course-blocks/chocolate` ( ....}

My save.js file looks like so...

import { useBlockProps, RichText } from '@wordpress/block-editor';

export default function save( { attributes } ) {
    const { text } = attributes;
    return (
        <RichText.Content
            { ...useBlockProps.save() }
            tagName="h4"
            value={ text }
        />
    );
}

and my attributes are being pulled from my block.json...

{
    "$schema": "https://schemas.wp.org/trunk/block.json",
    "apiVersion": 2,
    "name": "course-blocks/chocolate",
    "version": "0.1.0",
    "title": "Chocolate",
    "category": "text",
    "description": "A playground for block development.",
    "supports": {
        "html": false
    },
    "textdomain": "chocolate",
    "editorScript": "file:./index.js",
    "editorStyle": "file:./index.css",
    "style": "file:./style-index.css",
    "attributes": {
        "text": {
            "type": "string",
            "source": "html",
            "selector": "h4"
        }
    }
}

Answer 1

The Fragment export lives in the @wordpress/element package, not block-editor.

Having said that, you no longer have to explicitly write <Fragment> (as of React 16.2). Instead, you can just use the "empty tag":

return (
    <>
        <p>One</p>
        <p>Two</p>
    </>
);