Prism uses not only oiio, but also some other modules in specific cases.
The problem with your attached file is that it's actually a .png file, which has the .jpg extension. If you rename it to .png it works fine.
For jpg and png image display Prism uses the image readers from Qt/PySide, which already can read these formats, but they need the correct file extension to understand what image format the content of the file is.
Prism uses not only oiio, but also some other modules in specific cases.
The problem with your attached file is that it's actually a .png file, which has the .jpg extension. If you rename it to .png it works fine.
For jpg and png image display Prism uses the image readers from Qt/PySide, which already can read these formats, but they need the correct file extension to understand what image format the content of the file is.