The most probable reason is that the endpoint URL is not hosting anything.

Are there any extra special characters you are adding or removing in your endpoint URL?

It can only mean that the service is down or the server hosting is not working.

You can check the availability of the server using any monitoring tool you want.

Thank you,

Pawan

Refer this url,
I think you have provided incorrect end point url .

Please refer below url for http Response codes usage.

https://www.restapitutorial.com/httpstatuscodes.html

Regards,
Bharathan.

Hi, 

404 indicate that the browser was able to communicate with a given server, but the server could not find what was requested. 

That could be due to multiple reasons like : 

1) Deployment did not happen properly and hence the url isn't available.

2) The requested/configured url is wrong.

Thanks

Hi,

I am also facing this issue.

I have Resource parameters and whenever the endpoint URL has resource parameters it is giving me "Resource not found" response.

Any help in finding root cause is appreciated.

Thanks,

Naveen