[API] Gitea API return 404

Hi everyone， I'm testing Gitea API,  I visit the web[1], and click "Try is out", no matter what I enter there, it returns 404, and I also test "/contents" [2], that's ok. [1] https://opendev.org/api/swagger#/repository/repoListPullRequests [2] https://opendev.org/api/swagger#/repository/repoGetContentsList