Hi Rajesh,

From what I gathered you are having issues with an OIDC app, where the value of the redirect uri is not registered in the OpenID Client in Okta. Here are the resources I have found on the matter:

<<In the following example authorize request

https://example.okta.com/oauth2/v1/authorize?client_id=0oais56vveNLSDqby0x7&scope=openid+profile&response_type=id_token&response_mode=fragment&nonce=1234&redirect_uri=

http://localhost:8888/my-app/signin.html/&state=someState

Make sure that redirect _uri = http://localhost:8888/my-app/signin.html/​ is registered as an allowed Login Redirect URI in Open ID Client (using client id 0oais56vveNLSDqby0x7 in the example above)

1. From the Applications page of the Okta Admin Console, click on your OpenID application
2. In the General tab, click Edit and add http://localhost:8888/my-app/signin.html/​ to the Login Redirect URI. Make sure the redirect URI in Open ID client matches exactly: for example, if there is a trailing slash (/) that is also added to the url, otherwise you will still get the error. 
3. Click Save and General settings should look like:

>>

Have a great day!