Having problems intgrating the app into my react app

starting my app returns this errors why?

Uncaught AuthSdkError {name: “AuthSdkError”, message: “No url passed to constructor. Required usage: new OktaAuth({url: “https://sample.okta.com”})”, errorCode: “INTERNAL”, errorSummary: “No url passed to constructor. Required usage: new OktaAuth({url: “https://sample.okta.com”})”, errorLink: “INTERNAL”, …}
OktaAuthBuilder @ app.js:39559
(anonymous) @ app.js:7561
OktaAuth @ app.js:39799
OktaAuth @ app.js:39793
componentDidMount @ app.js:37708
(anonymous) @ app.js:62997
measureLifeCyclePerf @ app.js:62808
(anonymous) @ app.js:62996
notifyAll @ app.js:33377
close @ app.js:64918
closeAll @ app.js:13595
perform @ app.js:13542
batchedMountComponentIntoNode @ app.js:35198
perform @ app.js:13529
batchedUpdates @ app.js:64590
batchedUpdates @ app.js:6914
_renderNewRootComponent @ app.js:35391
_renderSubtreeIntoContainer @ app.js:35473
render @ app.js:35494
(anonymous) @ app.js:31021
webpack_require @ app.js:20
(anonymous) @ app.js:56035
webpack_require @ app.js:20
(anonymous) @ app.js:63
(anonymous) @ app.js:66