Description

If a user enters invalid Latex notations, an error is shown visibly. This error is not explicitly connected to the textarea and is not announced to screen readers.

Step-by-step reproduction instructions

1. Enable screen reader.
2. Add math block.
3. Type x&

You should see a visual warning. It will not be spoken and the user will not have any equivalent feedback.

Screenshots, screen recording, code snippet

Environment info

• WP 6.9-RC2-61266, Gutenberg 22.1.0
• Chrome/NVDA

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure