Unable to use shortcode

Hi I have installed the pro version and add the credential of a firebase app. However I was not able to add shortcode and got this error message.

[Firebase] – product key is missing from sub.streetcare.us or domain name is incorrect (missing or having extra www). Please visit https://techcater.com/shop/my-account to update your configuration.

I double checked the product key and it should be correct. Which domain name should I include? Is this the authDomain under the firebase credential? Should I put the domain name anywhere else besides the plug-in general?

I also tried to link with the cloud functions. I could see the functions I added from the firebase side but still I can’t creat/request user or database information.