Deploy the PowerServer Web API application in a path that is not directly under the domain name, such as using Sub-Application under an IIS Web Site.
When accessing the Health-UI page (e.g.: http://www.example.com/applicationA/health-ui/), you can see that the page is loaded, but there are no details shown on it.
This is a PowerServer 2021 bug.
It is fixed in PowerServer 2022.
1. Go to the C# solution -> ServerAPIs -> HealthChecks -> health-ui.
2. Open index.html.
3. Search “health-details” in this file.
4. Change '/health-details' to '../health-details'. (adding two dots in the path).
5. Then publish your Web APIs again.