Unable to join warriors guild

[Coletca]

I’m level 12, fought alongside Dumek but the guard at Lannegar warrior’s guild won’t open the gates for me.

 

[VDX_360]

What's the dialogue say?
What does your quest log say about Fort Assault?
(did you talk to the Chancellor by the Town Hall to complete the quest?)

 

[Denzera]

Also, to be allowed to officially join the guild, you have to complete the quest Bullfighting, given in the New Garand warriors guild hall. Which you can only get after completing the Fort Assault quest.