Mid-event? Call or text (732) 555-0199 — the line is live from delivery until your return is scanned.
Pull the printer tray fully out, then slide it back in.
Do not pull the paper. The ribbon re-seats itself when the tray closes, and pulling the paper is what turns a thirty-second fix into a real jam.
If it still will not feed after two tries, call (732) 555-0199. We can see your kit's status from here and we have seen this one before.
Two minutes, and you'll know either way.