Note that it can't be flagged, voted on, or commented on. This is likely because the question it is part of is also a locked question. The "I'm done" button successfully completes the audit.
Answers where there is no way to act upon it (impossible to vote, flag, or comment) shouldn't be selected for audits. It increases the likelihood of "what should I do?" which can have adverse consequences for the reviewer.
The answer (note inability to flag there because its locked):
Side note: this can have other possible bad audits in the event of an answer being deleted because of a rejected migration where the answer originated on the other site.