Yoast readability analysis showing incorrect results

Hi guys, I hope you can help me.
I’m seeing a red error in my readability analysis in Yoast as follows:
Subheading distribution: 1 section of your text is longer than 250 words and is not separated by any subheadings. Add subheadings to improve readability.

I have checked every paragraph and none of them are anywhere near 250 words in length between sub-headings.
Please can anyone help me with a solution to this?

Thanks