How to call an Image from html in Web Dev?

Hello, i am trying to show an image in my html file. I saved the image in the same folder as a file/png.
When I use the standard html call i get a broken link. I get the following error…

Problem accessing /main/system/webdev/files/web/White85.png. Reason:

** Deserializing resource failed: Unexpected parsing error during XML deserialization."**

anyone have any ideas?