Module build failed: Error: Using babel-preset-react-app requires that you specify NODE_ENV or

[HayenPhan]

Module build failed: Error: Using babel-preset-react-app requires that you specify NODE_ENV or BABEL_ENV environment variables. Valid values are "development", "test", and "production". Instead, received: undefined. (While processing preset: "/Users/hayen/code/node_modules/babel-preset-react-app/index.js")
at Object. (/Users/hayen/code/node_modules/babel-preset-react-app/index.js:51:9)
at Module._compile (module.js:643:30)
at Module._compile (/Users/hayen/code/headless-wp-starter/frontend/node_modules/source-map-support/source-map-support.js:492:25)
at Object.Module._extensions..js (module.js:654:10)
at Module.load (module.js:556:32)
at tryModuleLoad (module.js:499:12)
at Function.Module._load (module.js:491:3)
at Module.require (module.js:587:17)
at require (internal/module.js:11:18)
at /Users/hayen/code/headless-wp-starter/frontend/node_modules/babel-core/lib/transformation/file/options/option-manager.js:296:17

@ multi ./pages?entry

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How can I fix this? This happens when I try to run frontend

• node version v8.9.4

[fullmetalsheep]

facebook/create-react-app#2377

this solves it.

[tristanoneil]

@HayenPhan It looks like there might be an issue with another node_modules directory being at the same level as headless-wp-starter. Could you try removing or moving /Users/hayen/code/node_modules and trying again?