Which Umbraco version are you using?

16

Bug summary

Custom 404 Page not working in Umbraco 16. It was working fine in Umbraco 15.4.2.
Stopped working after migrating from 15 to 16.
https://docs.umbraco.com/umbraco-cms/tutorials/custom-error-page#404-errors.

Tried with fresh umbraco 16 install, still not working

Specifics

No response

Steps to reproduce

Follow the steps as the document
https://docs.umbraco.com/umbraco-cms/tutorials/custom-error-page#404-errors

Expected result / actual result

No response