Has anyone else experienced this error? WE have noticed massive drop offs in our traffic and this is harming our business becuase we are about to be accepted on to a major advertising network and if they see these drops it is quite possible we may not be accepted.
As I explained in the email I sent you, this is a client side error that can be caused for various reasons including corrupted cookies in the browser or DNS cache in on your device.
I did investigate this specific error that you’re getting : 400 Bad Request Request Header Or Cookie Too Large nginx
That issue can be caused by corrupted cookies.
The solution is to clear the cache and the cookies from sites that cause problems.