[scribus] When we open an SLA file, all the image frames are empty. How come the images don't show?

[scribus39.amabel at xoxy.net]

Hello,

We're new users of Scribus.

We've created a Scribus file (SLA file) with some image frames. The
image frames contain PNG files from my hard drive.

When we close the SLA file and open in the next hour, the image frames
have a big red X in them, and don't have the images. What are we doing
wrong?

Also, if we want to send the SLA file to someone else, how can the
recipient see the images?

Thank you.