Help with Luban

Two issues
when using Luban at times a project will not load I get a failed to load message. my second issue when I go to generate the g code message says preparing slicing and does nothing else will not generate the g code. I am far from computer smart so I know I am doing something wrong. HELP
Also is there a link to a real manual for Luban
PS using a SM original

Generally that means there is some sort of mesh problem with the model. Can you post the model or a link to the model? Although sometimes other Slicers can slice it when Luban can’t.

I just noticed something when I start up the Luban program none of the drop down menus show on the right side of the screen. They should show, correct? could this causing my issue and if so how do I correct.I have tried removing and reinstalling problem and even restarted the computer.