Error running Chinook guided project locally

I’m trying to work on the Chinook database guided project locally, but I get the following error. On DQ everything works fine. Anyone know a workaround?

Environment variable $DATABASE_URL not set, and no connect string given.
Connection info needed in SQLAlchemy format, example:
               postgresql://username:[email protected]/dbname
               or an existing connection: dict_keys([]) 

hey @cristobal

Welcome to DQ Community!

Please ignore if you have already checked this stackoverflow post -

Please share your notebook to figure out what part of the code might be causing the issue.

Hi @cristobal:

As @Rucha has said, please share your notebook or screenshot your errors so we can better assist you. You may choose to use these guidelines.