Talk:Mission: Signs of Trouble/@comment-2600:1700:730:D810:9C2F:F48C:A91B:BEBD-20180727194510/@comment-76.180.86.160-20190511235844

For sure it's not the Bridge to Amber Island mission, as written in the article, since I haven't finished it yet. Given the other answers, I don't think it's date triggered (for me it was available year 1, month 1, day 14). It may be either level dependent (Arlo says "The word around town is that you've been getting kinda strong" - personally I was level 14 when the quest became available), or after winning or a certain number of spar fights...