[next-mdx-remote] error compiling MDX: Unexpected character `!` (U+0021) before name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a comment in MDX, use `{/* text */}`) > 1 | <!-- | ^ 2 | <<< Author notes: Step 1 >>> 3 | Choose 3-5 steps for your course. More information: https://mdxjs.com/docs/troubleshooting-mdx