unauthorized_client in GetCampaign.php file after use refresh token from webapplication

Hello Adword Team, I want to use webapp flow for get all users info when they visit my site. When i use Console for generating refresh token GetCampaign return all campaign but after generate refresh token using outh from browser it gives me error Uncaught exception 'GuzzleHttp\Exception\Client

REfresh token from outh2 is not working and gives error like "401 Unauthorized` response: { "error": "unauthorized_client", "error_description": "Unauthorized" }"

HI, I am using adword webapp flow and show statics of adword,if user connect with my application. When i generate refresh token from console and put into adsapi_php.ini and run GetCampaign.php it return all campaign but if i get refresh token dynamically it give me error like " Uncaught except