Moderators should report protests to the #protests channel for the TD to resolve. They should @mention the TD to make sure they have their attention.
Like in an in-person tournament, moderators should not reveal the identities of the teams protesting until the decision has been made.
Tournament directors, you may need to resolve a protest by having teams play a replacement question. If the teams have already moved on from their rooms, you may want to add them to an empty room using the same process for adding teams to normal rounds.
Set editors, it can be helpful to go back through the #protests channel after the tournament for possible revisions to questions.