Beat boss at Rayne Syndicate's Tower with friend

[Satchet]

I try to beat the first boss in multiplayer but my friend can't go in after i'm inside. we're force to beat it alone. is this because it's count as tutorial or it's just a bug?

[Vaati]

Make sure your both holding to join the tower boss at the same time and not one after the other, me and my friend got in just fine but i have come to understand that once the fight starts it becomes locked.

[SepSlither]

Originally posted by Satchet:

I try to beat the first boss in multiplayer but my friend can't go in after i'm inside. we're force to beat it alone. is this because it's count as tutorial or it's just a bug?

Join the boss fight before starting it. In the top right it'll show participants of the fight. Once it starts, no one can join.

[Wolfie]

you tap F to join, then when everyone has joined, then you hold F to go inside

[Lame_Mule]

Yeah this has to change asap. It's hardly clear on the UI what a party is supposed to do and even when a friend and I tried to join just now, only he could get in and the prompt to enter disappears with "Other players are currently inside".

Hoping the devs can fix this before long.