Air in the hydraulic system.

Bleed the system and check for damage.

Master cylinder seals or actuator hydraulic cylinder seals worn.

Replace the worn seals.

Not enough pedal travel.

Remove the aftermarket follor covering from behind the clutch pedal.

Worn or damaged concentric slave cylinder.

Replace the worn or damaged concentric slave cylinder.

Worn or damaged driven plate.

Replace the worn or damaged driven plate.

Binding in the driven plate.

Replace the plate.