Snapmaker Luban issues in laser functions

When creating and loading an image into the Snapmaker Luban software and after designating all their toolpaths, I tried to generate the G-code file and it showed all the designs/objects I put on the work area disappeared. When selecting close preview, it pops back up. Then, I won’t allow me to export the G-code to the workspace or a file. I tried to save the document and import it to the workspace but it didn’t show my previous design, instead it showed the gift box design from the library. Any idea what I am doing wrong or what may be the problem?