Chizambers

I was running into a similar issue. I had done quests and made choices that put me in Hero status for both The Dozens and The Knights of the Crucible. I had completed The Bronze Beneath the Lake and Built to Last as I was trying not to pick a side early on. This made it so neither side would let me speak at the hearing. My solution was to attack the guard inside the front door of the Crucible Knights HQ. Doing this lowered my standing with the Crucible Knights. Wenan of The Dozens then gave me the option of representing them at the hearing. I was able to continue the quest from there.