Ir your ACE light is unresponsive and there is no obvious cosmetic issue, then it may be stuck in a charging state. In order to wake the light, please connect different charger from what you have been using and connect/disconnect 3-4 times in quick succession in order to wake the light.

Failing that, plug the light into a powered USB, then search for the light using the See.Sense app. As you may be able to connect to the light and update the firmware whilst it's charging. Once updated the light should become responsive and the bug will be fixed.

Failing all of that, please open a ticket if you haven't done so already and we can advise further.