Error in multiselect

[furrutia95]

Hi, im new in Tailwind Elements and i want to trying making a multiselect, but when i use the Docs:
//Logica MultiSelect
const multiSelect = document.querySelector("#multiSelect");
const multiSelectInstance = Select.getInstance(multiSelect);
multiSelectInstance.setValue("4");

I have this trouble

Anyone can help me plz? I need solve this from my work :(
Edit: It used to work, but out of nowhere it started to fail.

[juujisai]

Hi! Was the component initialized? Did you call the initTE method / use the via JS initialization? You can also change the getInstance method to getOrCreateInstance.