If you are playing the 18+ version, try completing the tutorial on the all age version instead (nutaku.com instead of .net)

I find Chrome runs nutaku games the best with the least amount of bugs, I don't even have to clear cache after each maint 99% of the time.
Also try using a different affection item, from memory that quest is meant to be done with 2 of the 3 Nazuna's Cake they gift you with.

I've tried everything everyone here mentioned and still no luck. Using google chrome, cleared the cache, tried to do it on the SFW version (same error still), and nothing.

Originally Posted by electrochoc

I've tried everything everyone here mentioned and still no luck. Using google chrome, cleared the cache, tried to do it on the SFW version (same error still), and nothing.

You tried using a different browser also? If you did, then I don't really know what else to tell you aside from filing a support ticket (https://www.nutaku.net/support/game-inquiries/).

Since you have only just started, you could always create a new Nutaku account and replay the tutorial with a new account and abandon the stuck one?