I did a little bit of clean-up on the AI file itself. You had some stray points. A lot of the heart wasn’t connected (I connected just to make it a continuous cut)… but when saving it as SVG, got a dialog box saying : the following items could not be exported properly - transforms are expanded.
It seems like something in the original design was transformed and it doesn’t want to export it correctly. I can see a transform ID in the SVG code but even redrawing elements etc doesn’t seem to get rid of the error - or copying to a new doc and trying to save.
Update: @info10 So deleting the main heart element got rid of the error.
I redid your heart element and it saved just fine. Something in the way that was designed originally ticked off the SVG process.
tori-3.svg.zip (21.4 KB)