Tried to run api api/vi/users, but always got "403 unauthorized“

I tried to run api to get user list, and i am using admin api key, but got below error, can you advise?
“error”: “api.403.unauthorized”,
“errorMessage”: “You are not authorized to access the requested resource.”

Hi @Liu_Larry,

Can you please indicate your version number (e.g. 3.4.0-5)? Please include this information in your posts, as it assists others in helping to troubleshoot.

PKP Team

Hi Support,
my version is 3.4.0-4
just ran api/v1/submissions and got 403 issue.

in fact, i tried different api, like api/vi/users, none working, all returned 403 error