Getting "Code not found" issue while getting user access token after app access

https://api.envato.com/token?grant_type=authorization_code&code= [CODE] &client_id= [CLIENT_ID] &client_secret= [CLIENT_SECRET]

I am using this request for getting access_token for user. After access approve by user i am getting response “Code not found”.Any one got this issue by this is asking this. I am using same code that is return by envato Auth2 but still getting same error from last hour.

Thanks