Aye! Here you go… This is what I see by clicking on one of the “Reject” buttons.
This is the Info text related to the first warning
create_errors_json called with unrecognized type: #<Reviewable::PerformResult:0x00007fd1d233e4a0 @status=:failed, @reviewable=#<ReviewableUser id: 15, type: "ReviewableUser", status: 0, created_by_id: -1, reviewable_by_moderator: true, reviewable_by_group_id: nil, claimed_by_id: nil, category_id: nil, topic_id: nil, score: 1.0, potential_spam: false, target_id: 2685, target_type: "User", target_created_by_id: nil, payload: nil, version: 5, latest_score: nil, created_at: "2016-09-27 19:25:30", updated_at: "2016-09-27 19:25:30">, @transition_to=nil>
and this is from the second one…
Uncaught [object Object]
Window Location: https://www.forumastronautico.it/review
If you need the backtrace let me know (lots of text)