You can ride it up but not hard at all
That spider spring works in conjunction with the ramps in the rear to all the clutch to slip under engine breaking that exceeds the redline of the bike. So you won't want to be downshifting from 5th redline to 2nd gear until you get this fixed.
You are very lucky the spring losing it's two arms didn't do more damage. Inspect the back of your pressure plate.
The nicks and burs inside the inner basket don't look too bad but the photo may not show all the damage. Your primary concern is the threaded pins emerging from the back of the inner basket from the out basket to secure your pressure plate and springs to.
The spider spring is a 'secondary' spring to the 6 primary springs so you can get slip in both directions, on and off power, potentially. Hence the recommendation to just ride it easy home.
From what I can recall you can't get replacement components from Ducati for this basket but you may be able to get a new spider spring from STM.
You can get an adjustable STM replacement slipper clutch but they (as you probably know) are expensive. If you've found yourself wanting the clutch the start bleeding off energy earlier or later than your current clutch then you will be much happier with an adjustable slipper than this one. You can get the ball bearing type with various degrees of ramp
AFIK it's the only non-adjustable slipper that STM has ever made.