google rich snippets does not work

Hi. I love Likebtn. When I first install it the last year, google rich snippets worked properly. Google recognized over 180 page increasingly day by day. But after that, suddenly the number began drop day by day. In one month, the number dropped to zero. Now Google shows there is no rich snippet in my website. What do you think about the problem. I suspect from Rankmath or ExteranalLinks plugins. But I cant test. What do you recommend to me?

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