Failed to obtain access token

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Hello,
I have a problem and i can`t get the access token.In other words i checked and i can`t make the exchange between the authorization code and the access token.I also checked the db and there are authcodes saved. This error appears on the callback redirect after the client authorised..

Failed to obtain access token

InternalOAuthError: Failed to obtain access token
at OAuth2Strategy._createOAuthError (C:\Users\Serban\Desktop\JDL-client-test\node_modules\passport-oauth2\lib\strategy.js:348:17)
at C:\Users\Serban\Desktop\JDL-client-test\node_modules\passport-oauth2\lib\strategy.js:171:43
at C:\Users\Serban\Desktop\JDL-client-test\node_modules\passport-oauth2\node_modules\oauth\lib\oauth2.js:176:18
at passBackControl (C:\Users\Serban\Desktop\JDL-client-test\node_modules\passport-oauth2\node_modules\oauth\lib\oauth2.js:123:9)
at IncomingMessage. (C:\Users\Serban\Desktop\JDL-client-test\node_modules\passport-oauth2\node_modules\oauth\lib\oauth2.js:142:7)
at IncomingMessage.emit (events.js:129:20)
at _stream_readable.js:908:16
at process._tickCallback (node.js:355:11)

Start at the OAuth callback redirect and trace the authorization-code exchange described in the report, using the passport-oauth2 stack trace as the initial lead. Compare the callback and token-request configuration with the saved authorization codes; done means the reported flow obtains an access token or the failing request is identified and reproducible.

Written by the indexing model from the issue text.