redirect_uri_mismatch error while fetching access token from salesforce for auth 2.0

[Obito]

OAuthProblemException{error='redirect_uri_mismatch', description='redirect_uri must match configuration', uri='null', state='null', scope='null', redirectUri='null', responseStatus=0, parameters={}}

 Hi All, 

I get the above error while fetching the access and refresh token from salesforce for auth2.0. May I know what i am missing.

Thank you.

[Neeraj Modi1]

@Obito Did you find the solution for this issue, even I am getting the same error.