Guild Wars 2

It says it costs 0 gems, but when I attempt to buy the episode, it says something is wrong with my internet connection

Just got back into the game and I cant unlock part 2 of dragon’s reach. I completed all the previous episodes but it says part 2 is locked.When I click the buy option it says “check internet connection.” Is it too late to unlock the last ep?

Thieves are supposed to stealth and deal damage in quick bursts, just give mesmers empathy or another anti melee skill from GW1