Error – post meta table exceeds the size limit.

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.

Please add this filter to your site:

/**
 * Filter to change the Post Meta Table Limit
 */
add_filter('rank_math/seo_analysis/postmeta_table_limit', function ( $limit ) {
		return 500000;
	}
);

And here is how to add a filter to your site: https://rankmath.com/kb/wordpress-hooks-actions-filters/

Then, clear the SEO Analysis cache by going to Rank Math > Status & Tools > Database Tools > Clear SEO Analysis

Once done, start again the SEO Sitewide Analysis.

I hope that helps.

Thank you.