Please Help Ultimatum in act3

I never received the ultimatum in act 3 from the chimera. I am essentially locked out of doing the ascendancy. I have gained other ultimatums but the campaign one allows you to try until you complete it. This has caused a soft lock for me.

Invitations for 3rd and 4th ascendancy drop in maps only as far as I know.

Quite common drops too, so dont worry about it. You´ll get them soon enough.

I think you misunderstood but thank you for replying. The mission in the campaign for the second ascendancy in act 3 the ultimatum should drop from the chimera and be one of the green ones that you can redo until completed and I never got one.