Sims 4: Island Living - beach towels not showing and very glitchy

I’ve downloaded the Sims 4: Island Living and having LOADS of issues! 

1) The beach towels aren’t showing AT ALL. Can find them on build mode but when I go to place them down, they’re invisible. Sims just look like they’re lying on the ground.

2) Suntan doesn’t work. Whether that’s to do with the above but when I get the sim to sunbathe, they just lay there and burn. I have bought the sunblock on build mode but you can’t even click on it to use it??? 

3) Snorkling. When I get my sims to snorkel, they just run around in circles around the buoy.

4) My sims don’t seem to swim when I get them to go back to land whilst they are swimming in the ocean. They just run across water!!! 

Bit annoying for game play. Does anyone have any solutions?!