Uncaught TypeError: Cannot read property 'string' of undefined

[zdrsoft]

Here is listed the error:

Uncaught TypeError: Cannot read property 'string' of undefined
at Object../node_modules/react-expandable-grid/lib/index.js (bundle.js:139247)
at webpack_require (bundle.js:679)
at fn (bundle.js:89)
at Object. (bundle.js:1619)

ReactExpandableGrid.propTypes = {
gridData: _react2['default'].PropTypes.string,
cellSize: _react2['default'].PropTypes.number,
cellMargin: _react2['default'].PropTypes.number,
bgColor: _react2['default'].PropTypes.string,

The problem is in PropTypes for reactJs v16 and above.
"Note: React.PropTypes is deprecated as of React v15.5. Please use the prop-types library instead."
Please, update the code using the separated prop-types library.
Thank you.