I'll start with I play on PC and I don't use any mods. I started a new character for the event, a single female living in Willow Creek. I was able to do the event through the planting of the flowers ...
Ideas
Tried all the solutions here... still not working. I am not able to complete any tasks for the part 2 of the first week "A Call Away". *sigh*
I just tried this one and it fixed more than I even knew was bugged! Like the tasks didn't show on the left before, I didn't have expedite mail delivery option, etc. This fixed it all for me :)
https://forums.ea.com/idea/the-sims-4-bug-reports-en/reapers-rewards-plumbob-icons-for-quests-no-longer-available/4971089/comments/4976867