Board Game Arena

Playing my second game and trying to get my bearings. I have chosen Explore +1 +1 as my phase option on first turn. But I still get message that "YOU must choose a phase to play". If I try +1 +1 again, message says "You have already selected this phase option". Is this a bug?

1) If you were playing a 2 players' game, each player has to select 2 phases each round.
2) If you weren't playing a 2 players' game, maybe there was some kind issue on that table... have you tried refreshing the page with F5? Sometimes it can solve the games' errors

In a two player game you can select upto two phases of play.
In the explore phase you are able to select the +1/+1 and the +5/+0 options.
This is the expected outcome and not a bug.