I've been following this blog post (it's a bit outdated): https://blog.railway.app/p/calendso
When running it on the dev environment I get this error, but I added my Google API Credentials into the .env file already. It's also not working on the live version either.
Railway Blog
In this post, we go over the process of deploying Calendso (an open-source alternative to Calendly) connected to a PostgreSQL database on Railway!