undefined is not an object (evaluating 'PropTypes.func')

[omybug]

undefined is not an object (evaluating 'PropTypes.func')
in TopButton.js

"react": "^15.1.0",
"react-native": "^0.27.2",

[Antonhansel]

Same here after upgrading to react-native 0.28, altough I don't have the stracktrace, only the error.

[alexrqs]

have you tried?
prepending, React, like:

Button.propTypes = {
  ...
  enabled: React.PropTypes.func,
  ...
};