Ring Pro Power Kit

Our Ring Pro was installed years ago when the Ring Pro was a new product and worked normally until a few months ago. Live View currently works fine but the Ring App never connects when the doorbell button is pressed (as in our earlier post). WiFi connection has always been strong but we've tried every setting, channel, static IP address assignment in the router, etc. but without success. We have the small circuitboard installed in our mechanical doorbell but now see in the Ring Pro Manual that there is a Pro Power Kit. Assuming a voltage issue from an older doorbell transformer, would the Pro Power Kit ensure sufficient voltage to the Ring Pro so it would again function as it used to? And if so, how do we obtain one? Many thanks.