Error with `getBoundingClientRect`

[aralroca]

It's crashing with this error:

<Popover
    isOpen={isOpen}
    content={
      <form
        ref={formRef}
        id={id}
        onClick={(e) => e.stopPropagation()}
        onSubmit={onSubmit}
        class={style.popover}
      >
        <ul>
          {calcAmounts(step).map((amount) => (
            <li key={amount}>
              <button
                type="submit"
                class={cn({
                  [style.active]: amount === qty
                })}
                onKeyDown={(e) => {
                  if (e.key !== 'Enter') return;
                  setQty(amount);
                }}
                onMouseUp={(e) => {
                  e.stopPropagation();
                  setQty(amount);
                }}
              >
                {amount}
              </button>
            </li>
          ))}
        </ul>
        <fieldset>
          <input
            type="number"
            min={0}
            step={step}
            onInput={(e) => {
              const input = e.target as HTMLInputElement;
              const newValue = input.valueAsNumber;

              if (newValue % step !== 0) {
                input.setCustomValidity(
                  `The value should be multiple of ${step}.`
                );
              } else {
                input.setCustomValidity('');
                setQty(newValue);
              }

              input.reportValidity();
            }}
            name="quantity"
            value={qty}
            placeholder="Choose the quantity"
          />
          <button type="submit">OK</button>
        </fieldset>
      </form>
    }
    positions={['top', 'left']}
  >
    <ButtonQuantity
      title={title}
      quantity={qty}
      className={style.popoverTarget}
      size={'medium' as any}
      variant="add"
      disabled={isDisabled}
      onClick={(e) => {
        e.stopPropagation();
        setIsOpen((v) => !v);
        if (qty) return;
        setQty(step);
        updateItem(productId, step);
      }}
    />
  </Popover>

Note: I'm using Preact. Can be for that?