@webmakers2011 We’re sorry to hear that you are experiencing this issue with the plugin. Unfortunately as the Intense WordPress plugin appears to be a premium plugin and not available in the WordPress plugin repository, we aren’t able to test the issue to see if we can replicate it.
Can you please confirm you are using WordPress 5.6? You can check by clicking on the W in the top left and selecting About. If you need to update, please check with your host provider. Please know that if you are using an older version of WordPress Core you may experience unexpected behavior with Yoast. This guide explains more: https://yoast.com/why-we-dont-support-old-wordpress-versions/
Also, can you please ensure that both the Intense WordPress plugin as well all your site’s other plugins and themes are up to date and using the most current version?
If you update WordPress and all your other plugins/themes to the most current version, does this resolve the issue?