So I got Island Paradise recently and decided I wanted to make a mermaid. So off I go, adding the 25k points needed for the Mermadic Kelp, and making the sim eat it. This is where things go wrong. Very wrong.

With all my mods activated, ErrorTrap reports a Script Error partway through the transformation, and it doesn't appear to take all the way - no scales appear on the sim's legs and they don't gain a tail in water, but checking through MasterController reveals they are in fact a mermaid. The UI also freaks out: the mermaid's portrait panel vanishes, as does their picture above their lifetime wish, and the box to the side (where you'd see needs or inventory or whatnot) freezes on whatever it was showing at the time the error fired. Attempting to pull the box in removes the background but leaves frozen, unclickable versions of the UI behind - for me, this has always been the inventory because they just ate the Mermadic Kelp.

I tried uninstalling all my mods, and it didn't even get past the transformation - my sim would simply float in mid-air, covered in blue and bubbles, and would never actually hit the ground again.

Anyone know what's causing this, or how I could fix it? I've looked on Google, but apparently I need to read a Google-fu skill book or something because I couldn't find a solution.