Errors in evaluating the text

Can you try and gather as much information for us as possible?
1. Check for conflicts using this guide: https://kb.yoast.com/kb/how-to-check-for-plugin-conflicts?
2. Check for JavaScript errors with your console with this guide: https://kb.yoast.com/kb/how-to-find-javascript-errors-with-your-browsers-console

I understood why the plugin could not correctly analyze the article and gave out errors. In my article, I talked about the color characteristics of the display (DeltaE). At the end of the sentence it was written:

(средняя DeltaE < 2, максимальная DeltaE < 4)

This is what caused the mistakes. I checked, if I write my article in English, then the plugin works correctly. If in Russian, then he can not make a correct analysis of the text, issuing the corresponding errors.

I hope you can solve this problem.

Can you please confirm what language your WordPress is set to? What language the plugin uses is controlled by the language setting used in WordPress. You can change the language used in WordPress by going to Settings>General>Site Language.

If the WordPress is set to use English and the article is in Russian, it would not be able to correctly evaluate the text as it is using the English language to perform the analysis.

WordPress is installed in Russian.

As I said earlier, I understood what the error is. The plugin can not perform the correct text analysis when the specified word combination occurs.

That is, with old articles everything is fine, new posts are also perfectly analyzed.

However, if I use the specified phrase, errors occur. So I just deleted it and the plugin immediately started working as it should.

The screenshot you provided is no longer working. Can you please share the screenshot again here with us so that we can take a look at it?

Yes.

https://yadi.sk/i/vTgiQzXEOVrsmQ

It’s time to close this question. I have already said – this is the problem of the plug-in, which can not conduct a correct analysis of the text because of the above-mentioned phrases. Therefore, the only solution at the moment is the replacement of phrases (leading to an error) with simpler ones. I delete the screenshot.