I think we’d need to know more about your system (transformer, chime, wiring, how you connected the Chime Controller, etc.) in order even to begin to answer. Was the doorbell working at any time after the initial installation? Providing information about the timing of the issue might be helpful, too.
One topic that comes to mind when reading this is Wired Doorbell Chime Sensor fried?, but the user who posted that apparently hasn’t ever returned to report any kind of resolution.
I also notice that you tagged your topic with cam-outdoor-v2, but did you intend to choose video-doorbell-v2? That’s the model that typically comes with Chime Controller, though it can also be installed to work with Duo Cam Doorbell.
Welcome to the Forum, @stevebab! 