Currently I am running my site through neilpatel's website for the purposes of an audit on SEO - the analyzer continues to return a 404 error that i cannot find anywhere, following this URL structure exactly:
Although i have set up a permanent 301 redirect on the Microsoft IIS system hosting the website (these seem to be housed under the VM's Rewrite module and not the HTTP redirect as i had thought they may be) which now sends any requests for https://www.example.com/case-studies.html to https://www.example.com/insights/case-studies.html, I feel that I may either be doing it wrong, or missing something fundamental in being able to identify where this 404 is coming from. Part of this stems from the fact that i do not know how to frame the question correctly to search engines.
I have checked my sitemap for this anomaly, and trawled all of my HTML content as well to see if it is hiding in there.
Could anyone advise as to whether i am making a simple or stupid mistake here?