Two separate issues.
The failure of the clutch to engage will have one of thre probable causes, in order of likelihood.
1.) The plunger that depresses the piston in the master cylinder has come loose in the barrel in the lever and has wound itself out. Wind it in again and lock with the grub screw.
2.) The slave cylinder bolts have come loose allowing the slave to move rearwards and limiting lift on the thrust mechanism. Tighten bolts.
3.) There is air in the system. Unlikely unless the bike has been dropped. Bleed clutch.
The broken mounting bolt may be the result of stress imposed on it what the bike was dropped. If the clutch system has air in it it would seem to indicate it may of been dropped at some point. It may also simply of been bad luck, bit I'm skeptical.
Pete