Error when publishing map : [DEP] Backend dependency returned unexpected error http_error_400:api.qstv.on.epicgames.com

[O_Shiri]

i found a post on reddit that had a similar problem. They mention how the map trailer format should be mp4.it worked for them and it worked for me too. just thought i should mention it. https://www.reddit.com/r/FortniteCreative/comments/1kmoz07/has_anyone_found_a_way_to_deal_with_this/