I don't think it's a cut concrete fix. I would be amazed if there was no consideration given to maintenance of the lighting system. If it is a controller, and not the LED itself, that is very likely in another location that is accessible. Either way, it will get fixed, most likely overnight, and without any disruption.There’s no easy fix anytime soon. The various issues are also not something you can easily fix in one evening. It would be incredibly bad optics to have cut concrete and construction walls back up in your “brand new” centerpiece.
That’s why I think they’ll just shut it off and move on.