Stucked at Rocket Reef - MySims Kingdom

Hello

I'm stucked at the Rocket Reef.

The rocket is completed and everyone is happy about it. Lyndsay says how the king would be happy receiveing the news.

But I don't know what else I need to do?

I only have two missions active: the fish one and the crazy science one (but I need the 8 ball and it will be on the candy island)

I haven't unlocked the next two Islands, so I don't know what to do.

I tried to visit other islands to reset it, but it doesn't work.

Could you help me please?