For me the same happened, howeverSo, apparently, if you don't finish "A Very Hostile Takeover" before dealing with Valor in Denver, quest will automatically fail, cause Charley Knowes and his cartel are tired of waiting and are attacking on their own. Shame, will check how it is going in Bizzare now.
they were still in the house at the parking garage you're supposed to meet them, but you can't start their mission, you can however talk to the cheif of the Bizzare and say you know about a coup attempt, which sends you to kill them and will complete the quest that way and give you further discount at the Bizzare