Support » Fixing WordPress » this block contains unexpected or invalid content

  • Hello,
    I have noticed that if I decide to edit a block via HTML in Gutenberg and add an attribute to a tag, I will get the unexpected or invalid content message.
    Other than wrong code, what else causes this?

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  • Moderator bcworkz


    The blocks are very finicky about what attributes they’ll accept. There’s a brief whitelist of what’s acceptable. Any deviation causes that message to appear. If you need to customize block HTML, your best option is to copy the HTML into a Custom HTML block and edit and use that version instead.

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