After reading the CNN article, I don’t see this to have been a Watergate-like break in. Rather, attorneys for Trump were invited by someone (not identified) who had possession. The Trump people were looking for something to substantiate their claim that the machines didn’t work. But, they found nothing. I agree that the effort was desperate. But, I don’t see how the effort was illegal.
The invitation was sent to the attorneys by a woman named Misty Hampton. My impression is that she didn’t have the authority to do it.