How to solve "We couldn't find the page you were looking for."

Hi.

When you click on a picture in Home, you should see the following detail page, which displays a warning.

'There is an error in the URL entered into your web browser. Please check the URL and try again.
The page you are looking for has been moved or deleted.'

Is there a way to solve it?

For your information, no manipulation was made.

 Without access to your site and knowing which image, it's hard to pinpoint what the problem is.