Your site doesn’t include support for the Table of Contents

After upgrading to WordPress Version: 6.5 and using Rank Math SEO (1.0.216) FREE:

Rank Math’s Table of Contents Block is no longer available in existing posts or new ones.

In existings posts it shows (in edit mode for Block Editor):

Your site doesn’t include support for the Table of Contents by Rank Math block. You can try installing the block, convert it to a Custom HTML block, or remove it entirely.

Install Table of Contents by Rank Math
Keep as HTML

If clicking on “Install Table of Contents by Rank Math”, then the whole Rank Math plugin is removed.

In new pages (in edit mode for Block Editor): the RANK MATH section of blocks only shows:
– FAQ by Rank Math
– HowTo by Rank Math
– Schema by Rank Math

(the page already has HowTo inserted so that one is disabled for new insertion)

Thanks