I’m getting an error that says "BlueSky Timer cannot currently join a meeting where authentication is required."
You will need to disable "Require authentication to join." If you need a security feature, you can enable passcodes in your Zoom settings for this meeting (on the Zoom website). The BlueSky Timer does not have the capability to enter information to get past this authentication step.
You can also update this setting for all future meetings by logging into the Zoom website and going to Settings, then Security. After updating your meeting settings, re-invite the Timer.