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Gtmetrix avoid bad requests

Gtmetrix avoid bad requests

When a web page testing tool (like Pingdom or GTMetrix ) suggests you ”Avoid Bad Requests” it means one thing: a 404 error or similar.
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Conclusion

Permalink Wordpress Permalink Issue for media permalink leading to 404 page when set as postname
Wordpress Permalink Issue for media permalink leading to 404 page when set as postname
How do I fix a permalink issue in WordPress? How do I change the media Permalink in WordPress? How do I change permalinks in WordPress without breakin...
Upload cant upload media/pictures to my wordpress site, cant upload anything to my database
cant upload media/pictures to my wordpress site, cant upload anything to my database
The image upload issue in WordPress is typically caused by incorrect file permissions. Your WordPress files are stored on your web hosting server and ...
Ajax post.php AJAX request not being called when publishing post
post.php AJAX request not being called when publishing post
Why Ajax post is not working? How do I send an Ajax request on the same page? How do I know if Ajax is working? How Ajax get data from another page in...