This above error will be occur when you do "npm run start-developer" or "npm start" without node module.

- While setup the theme or first time when we starting the project we need to install the "node module".
- To install node module donpm install

This above error will be occur when you do "npm start" instend of "npm run start-developer". And also some data which is coming from APIs, will not display.

- We need to do "npm run start-developer", to run the project.