Hello @CSC3 and welcome to the Community. The Charge 2 is an older model tracker that hasn't received any type of software update in a few years. You can try to restart your Charge 2. If a restart doesn't fix it, then I think it is at its end of life.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.