Site not loading for a particular path and getting error code 20
Hi All
We have site in the production preview environment assuming url as prev-www.testsite.com/global
The site loads fine with all the path example
1. prev-www.testsite.com/global/about
2. prev-www.testsite.com/global/community.
And the request is not working only for a specific path (prev-www.testsite.com/global/us) and is shown with error code 20. There is no caching rules implemented.

When /us path is accessed no logs are even generated in the dispatcher server, but all other paths are working fine.
The server architecture for request is: Browser -> WAF layer -> ALB -> Dispatcher server ->ALB -> Publisher server.
Can you please help me understand what exactly the issue.
Thanks.