Lift the tinted plastic cover and lower the envelope inverter access door.
The points identified here can be unlatched to allow access to jammed material.
Tap the Clear Deck button to clear the paper path of any remaining material.
Once you locate the jammed material, you may need to use the manual advance knob to manually feed paper out of the grip of feed rollers.
The manual advance knob is located behind the drop-down cover at the left front of the inserter.
UPDATED: November 23, 2020