Convert to JPEG in AR

I´m trying to create an AR Multiplayer. After the mapping is done the camera Image is taken so the next user has a better unterstanding where to positing himself.
The convert to JPEG Node fails with the Error: “ConvertToJPEG only suports UAppleImageInterface derived textures”.
I added the Aple Image Interface under Class Settings still the same error.
Any help or tips would be appreciated!