# Missing environment variable

Learn how to set up the required environment variables.

If you see an error like the one below, you probably forgot to set one of the required environment variables:

> **Error**
>
> Did you forget to set the `SOME_ENV_VAR` environment variable?

See the [configuration section](/reference/sdk/nextjs/manual-installation#environment-variables) for more information on the required environment variables and how to set them up.