I finished the 3F Boss mission with party members,but the Crystal Wall still there.
So I worry about I can’t go into deeper mine map,please help me break this Wall.
Sever:Orsha
TeamName: StayWithMe
Character Name : SnowFall
As far as I know the boss quest (activated by interacting with the red crystal, right?) isn’t a prerequisite to proceeding through the wall. What you need to do is the quest for collecting Vubbe Magic Stones, but oddly enough this should be started at the wall itself, so there is where your problem really lies.
Just to check, have you completed The quest where you free villagers trapped just above where you fought the boss, after climbing the stairs? I would check there because of the possibility of it being a prerequisite and not a bug.
Please, keep us informed about any updates on your issue 
Hi,it’s me again.
I collected magic stones and when i broke the wall(animation start) the emergency maintain start.
After maintain the wall still there,i collect magic stones again but the wall have no response.
So I pt with my friend then go inside to defeat the boss,but the wall still there:(
I already done all villagers mission in this map,please help me break this wall.
Thanks for reply. 