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Why I got 401 - Unauthorized error for the oAuth2 AccessToken?

I am using the Oauth2 access token for the whole last year, and there is no issue, but recently I always got 401-Unauthorized error , below are the details:


1. Create an OAuth 2.0 integration app on

2. Get authorization code by the link in myApp>Authorization>Jira platform REST API authorization URL

3. Get AccessToken by curl --request POST --url '' --header 'Content-Type: application/json' --data '{"grant_type": "authorization_code","client_id": {ClientID},"client_secret": {ClientSecret},"code": "v-TAFUul38VCjNgo","redirect_uri": ""}'


4. Use the accessToken to run the API /rest/api/3/project

5. I got Encountered a 401 - Unauthorized error while loading this page.




I appreciate if anyone here can help me with it? I have no clue what's wrong.




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