ABC has not commented on the sudden cancellation, but the industry site LateNighter reported that the decision stemmed from “a personal matter.”

When viewers tuned in at 11:35 p.m. ET, they were met not with Kimmel’s opening monologue but with a rerun from Oct. 28 — and widespread confusion.

A Reddit user claiming to have tickets for Thursday’s taping shared what appeared to be an email from the show’s audience department. “Tonight’s episode of Jimmy Kimmel Live has been postponed,” it read. “Apologies for any inconvenience. Will contact you to reschedule for a future taping.”