Please follow the troubleshooting steps here. As already noted, I have tested the plugin with Yoast SEO and was unable to reproduce the error, suggesting that the conflict lies elsewhere.
Since I do not know your site, I don’t know what you mean specifically by “product page.” I also don’t know what you mean by “not working.” Please provide specific examples. What do you expect to happen, and what actually happens (or doesn’t happen)? Are you visiting a product page in the backend, or the frontend? Are you using any Yoast extensions?
If you are willing to provide the site’s address I can look at it, but without access to the backend my ability to diagnose will be limited.
EDIT: I looked at your profile and visited your site. It looks like you have many other problems besides this. None of your site links work. You appear to be using the Astra theme so I installed Astra on my test site. The plugin worked fine with no conflict.
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This reply was modified 4 years, 8 months ago by
Chris J. Z?hller. Reason: Added information to post