Not able to insert images in RH V. 9

I am using RH 9 and JPEG images. When I open a WebHelp file to make edits, it will not allow me to insert images. When I select the image and try to insert it, I get the following message:

Then whether I hit Yes or No, the following message appears:

I have not changed the naming convention of any of my images, and they are all JPEGS. Any help appreciated.