So I started the Superllight tree and reached the second mission i.e "Corvus System Reconnaissance". Completed that mission and it said there was a new mission available. However I did not see any new mission in the list. I read somewhere that it required me to deliver a courier into UIT space and since my character was UIT KoS, I figured that must have been why it did not appear.

I then tried it on an alt, got the courier mission but the game suddenly crashed while I was in Bractus, thus interrupting the mission. The Corvus System Reconnaissance mission then reappeared and I did it again, it said there was a new mission available but none in my list. I am not sure if it's a bug or the way the tree is supposed to be.

EDIT: Issue resolved, apparently I had to lose the SuperLight I had received earlier in order to spawn the courier mission again. There also seems to be a timer to it.