kirac missions

So, im having a problem in game.

I have kirac missions, but his stash of missons don't open for me, and i have missions to do

i've already try to uninstall the game and download it again, but seems nothing change.

Can anyone help me?

Have you actually completed any maps of the same tier as the missions? You need to complete at least one white map (T1-5) for white missions, one yellow (T6-10) for yellow missions. Same for red.