If your ACB doesn't close, Please see if the ACB has the manual reset button(MRB) and it is put together properly.

By pushing the button and seeing if the button comes back out, you can check MRB button.

If it doesn't come back out, it must be put together properly with the cover removed.

Here is the Youtube Shorts Tutorial:
https://youtube.com/shorts/OCohthqcVFo?feature=share

If you have any issue putting it together, Please let our team know