TypeError: Parameter "url" must be a string, not undefined

[MaxAst]

When cloning the repo and running it with 'heroku local' I get the above error. I have all dependencies installed, downloaded npm and nodejs latest versions, and my config var for mLab seems to be fine too. Any ideas for what the problem is?

[chrisckchang]

It looks like the environment variable may not be set on your local machine. You'll likely need to do the following:

heroku config:get MONGODB_URI
// YOUR_MONGODB_URI printed here
export MONGODB_URI=YOUR_MONGODB_URI

[chrisckchang]

closing- feel free to reopen if this is still an issue.