Error in TradeApp (LeagueSelection)

Opened pathofexile.com and navigated to "Trade". After Searching "An Error occurred. Please try again later"

After some clicking around I realized that Next to "Search Items ..." there was "Select Option" dropdown for League Selection.

I suggest to either:
#1 make the error message more specific, or
#2 select a league as default


I guess this could happen a lot in the new league, if ppl have https://www.pathofexile.com/trade/search/Harbinger bookmarked or the browser autocompletes it.