# I keep getting an error while using react router, please anyone guide me what's the possible solution for this
**URL:** https://forum.kirupa.com/t/i-keep-getting-an-error-while-using-react-router-please-anyone-guide-me-whats-the-possible-solution-for-this/641236
**Category:** web dev
**Created:** [December 4, 2019, 7:13am UTC](https://forum.kirupa.com/t/i-keep-getting-an-error-while-using-react-router-please-anyone-guide-me-whats-the-possible-solution-for-this/641236 "2019-12-04T07:13:10Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Ghouse\_Shaik](https://forum.kirupa.com/u/Ghouse_Shaik)
#### Post date: [December 4, 2019, 7:13am UTC](https://forum.kirupa.com/t/i-keep-getting-an-error-while-using-react-router-please-anyone-guide-me-whats-the-possible-solution-for-this/641236/1 "2019-12-04T07:13:10Z")
react.js:20478 Warning: React.createElement: type should not be null, undefined, boolean, or number. It should be a string (for DOM elements) or a ReactClass (for composite components).
printWarning @ react.js:20478
warning @ react.js:20502
createElement @ react.js:10928
eval @ embedded:41
transform.run @ browser.min.js:4
exec @ browser.min.js:4
runScripts @ browser.min.js:4
react.js:20478 Warning: Failed prop type: The prop `history` is marked as required in `Router`, but its value is `undefined`.
in Router
printWarning @ react.js:20478
warning @ react.js:20502
checkReactTypeSpec @ react.js:17304
validatePropTypes @ react.js:10914
createElement @ react.js:10950
eval @ embedded:40
transform.run @ browser.min.js:4
exec @ browser.min.js:4
runScripts @ browser.min.js:4
react-router.js:1793 Uncaught TypeError: Cannot read property ‘location’ of undefined
at new Router (react-router.js:1793)
at react.js:6191
at measureLifeCyclePerf (react.js:5971)
at ReactCompositeComponentWrapper.\_constructComponentWithoutOwner (react.js:6190)
at ReactCompositeComponentWrapper.\_constructComponent (react.js:6176)
at ReactCompositeComponentWrapper.mountComponent (react.js:6084)
at Object.mountComponent (react.js:13768)
at ReactCompositeComponentWrapper.performInitialMount (react.js:6267)
at ReactCompositeComponentWrapper.mountComponent (react.js:6154)
at Object.mountComponent (react.js:13768)
---
### Author:  [@kirupa](https://forum.kirupa.com/u/kirupa)
#### Post date: [December 7, 2019, 11:27am UTC](https://forum.kirupa.com/t/i-keep-getting-an-error-while-using-react-router-please-anyone-guide-me-whats-the-possible-solution-for-this/641236/2 "2019-12-07T11:27:04Z")
Can you post your code somewhere so we can see it?