What is some appropriate messaging to deliver to a user when an HTTP request times out or fails?

I have a situation where there's a possibility that a user can try to load a page and the http request could take too long or fail. So that the page doesn't 'break', I want to deliver a pop up message to the user so that they can either cancel the request or refresh the page and try again which would likely fix the issue.

Any thoughts on what I currently have?