I am doing example of Spring Boot Security with wso2is server from this post https://github.com/angel-git/wso2is-springoauth, when I am trying to access resource with access
When the answer above does not solve this issue change OAuthConfigurations/RemoveOAuthHeadersFromOutMessage to false in the file api-manager.xml.
OAuthConfigurations/RemoveOAuthHeadersFromOutMessage
false
api-manager.xml