Hello friends,

How to solve cached 404 error..?

Google Cacheing 404 is an internal issue with the Google Cache server and does not reflect the index or ranking of web pages. Google's John Mueller has said in the past that pages without cached links are not considered to be of poor quality by default.
You have to open google console for fixed 404

Retry the web page by pressing F5, clicking/tapping the refresh/reload button, or trying the URL from the address bar again. ...
Check for errors in the URL. ...
Move up one directory level at a time in the URL until you find something. ...
Search for the page from a popular search engine.

Replace your domain with x.xyz/ in final cache URL.