When trying to play a Multiplay Quest, an error message “Failed to initiate Multiplay Quest” appeared.

This error is displayed when there’s a data discrepancy between players when initiating a Quest.
E.g. When someone leaves the lobby or change their status to

Prepare while the Quest is being started.

Even if this error has occurred, please don’t worry. You can start playing the Quest by having all participants set their status to “Ready.”