Content Not Published

hi Nullable​ 

The "Content Not Published – your post contains invalid HTML" error you're seeing in the Microsoft Tech Community (MTC) is a known pain point

Why it happens ?

• The editor inserts Microsoft-specific tags like <li-image>, <li-table>, etc. during content creation.
• These tags aren’t valid HTML but are used by the editor to render features like images, spoilers, and tables.
• When you edit a post, especially with complex elements like spoilers with images, the platform sometimes fails to properly re-render or sanitize these elements, leading to this error.

How to work around it (what you're doing is correct but here's a refined version)

1. Delete the spoiler sections and images completely.
2. Save the post.
3. Refresh the page to reload a clean editor context.
4. Re-insert the spoilers and images using the editor toolbar only — don’t paste from other sources.
5. Save again.

You’re basically forcing the platform to purge bad internal formatting and rebuild with clean elements.

If editing :

If you're doing repeated editing of rich posts:

1. Use Notepad or VS Code to write your content in Markdown or plain text first.
2. Build sections step-by-step using the MTC editor toolbar — especially for:
• Images
• Spoilers
• Code blocks
3. Avoid switching back and forth between "Rich Text" and "HTML" tabs during editing — this is known to corrupt tag rendering.

Avoid these HTML elements in edited MTC posts