why my rest interface return "{ "error": "no response from server" }" after configed by api manager

Question

I design a new api with api manager. when I invoked it in api console, it prompted the msg as the belowling jpg.

curl -X GET --header 'Accept: application/json' --header 'Authorization: Bearer 8dfb0253-5906-3ee5-ab28-cd53bc190ddc' 'http://172.17.0.1:8280/V2.0.0/common/test/test'

Answer 1

Possible reasons for the issue and solutions

1. Gatway uses https and self singed certificated. Type the gateway url in browser and accept the certificate then try with api console
2. CORS issue. Enable CORS as described in doc https://docs.wso2.com/display/AM200/Key+Concepts#KeyConcepts-Cross-originresourcesharing