Exporting SVG files and importing them

Hey, i tried to export SVG files with succes and also load them back in vectornator.
But now I finally finished a logo in a further project and after exporting the files seem to be empty.
Normally you see the little picture on the files when you safe them on your Mac but now it’s only something like a letter displaying.

I’m working on a Mac Studio
Someone knows what’s wrong here?

Thanks sjoerd