Jungle Adventure - "No vacation Rental Lots" Can't visit Selvadora

When using the phone to travel, the "Take a Vacation" option says "No vacation Rental Lots are available. You can change the lot type of an unowned lot to take a vacation there".

When entering Selvadora via the World Destinations menu, I cannot visit any lot. Some lots are full of sims, and the free ones do not work as the "Sim is unavailable for travel".

I have resolved this once by copying my entire sims family into a new save, but it lost a lot of skill, relationship, and job progress doing so. This cannot be the only viable solution - is there a fix for this?

My game does not have mods or CC. I have used testingcheats enable to put my relationships back to the way they were, but if this is whats causing the save corruption, I don't think it's fair that I have to lose all my progress making a cloned household every time the game breaks.

Thanks for your time!