Regarding Oauth 2.0 Authentication in codeigniter

I’m trying to use Oauth 2.0 for API authentication. It works on localhost,but on server it’s not working i’m getting error:
error getting access token from client_credentials flow postman

can anyone tell me, how can i resolve it.

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To Reproduce
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App information (please complete the following information):

  • App Type [e.g. Chrome App, Native App]
  • Postman Version [e.g. 6.0.1]
  • OS: [e.g. macOS High Sierra 10.13.2]

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