@gooma2 @marcusmackan
Are you using the latest version of WordPress v4.9.5? We’ve released Yoast SEO for WordPress v7.5.1. Please do update to the latest version and see if this addresses the issue.
Every time a new version is released, we do not intend for there to be plugin and theme conflicts or bugs and errors. Each website is different, with lots of different themes, coding, and plugins. We ask for these plugin and conflict checks to determine what the root cause is. It doesn’t mean that if 100 users are all encountering 404 errors, that they all have the same root cause which caused the issue. We apologize for any inconvenience.
Can you try and gather as much information for us as possible? Please perform the following:
1. Make sure the issue doesn’t persist when Yoast SEO is disabled.
2. Check for conflicts.
3. Check for JavaScript errors with your console.
If you find any JavaScript errors related to Yoast SEO or if there is a conflict with a plugin or a theme, you can create a new GitHub issue for our developers. Please report the issue to a third party developer as well.
If you didn’t find any conflicts or errors, we think the issue is specific to your site. We’d need to investigate further but are unable to do so on these forums. You can purchase Yoast SEO Premium and receive our Premium email support and we can help you further.