quest bug

[jagged maple]

You need to buy Colo's quest with coins first

[gaunt forum]

Don't even think about completing it any time soon

[north willow]

Well, it's strange that the mission appeared before and then it didn't.

[gaunt forum]

When Colo hands you the Quest scroll, it's given for free like most Village items
That resets when you Ultra Ascend, so you need to buy the scroll in order to reveal the Quest again.
It costs 1e55 / 10 St coins.