Yeah, Probably leaking from clutch cover or drain plug. Clean the area well and check after a ride. If it’s the clutch cover make sure both mating surfaces are clean when you remove the clutch. Get this gasket from treats. https://www.treatland.tv/puch-moped-E50-one-speed-clutch-cover-gasket-THI-p/e50-clutch-cover-gasket-thick.htm
If it’s the drain bolt, grab a new drain bolt gasket and thread it on with some high temp permatex thread lock.
Torque the bolts to spec and ride.