TypeError: Cannot read property 'object' of undefined

[jooj123]

After forking this repo and trying to run yarn start I get this error:

TypeError: Cannot read property 'object' of undefined
    at Object.<anonymous> (/Users/jooj/Documents/projects/react-gpt/node_modules/radium/lib/components/style.js:93:34)
    at Module._compile (module.js:635:30)
    at Module._extensions..js (module.js:646:10)
    at Object.require.extensions.(anonymous function) [as .js] (/Users/jooj/Documents/projects/react-gpt/node_modules/babel-register/lib/node.js:152:7)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)
    at Module.require (module.js:579:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/jooj/Documents/projects/react-gpt/node_modules/radium/lib/index.js:15:14)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Am I doing somethig wrong here ? Is master unstable at the moment ?