Error creating ./public/runtime-env.js: Error: Could not generate runtime config. Check your .env format! error command failed with exit code 1.

This Error usually occurs when you have issues in your .env file and try to run npm start or yarn start.

We need to take care of the following things to fix the above error.

1. Ensure .env file not empty.
2. Ensure correct Key, Value format.
3. No Duplicate Keys.
4. No unnecessary spaces, quotes.