PWA Builder dont recognize manifest file

[karimsalim]

Hello every body !
I try to create a PWA Application with PWA Builder.
My Website is hosted in private IIS Server and works fine.
When i try to launch a report in PWA Builder with my url i have this error :

My manifest file :
manifest.json
When i look on de devtools with Chrome i have errors :

I try with pwabuilder-manifest-finder/api/findmanifest with verbose activated and i have this error :

{
  "manifestUrl": null,
  "manifestScore": null,
  "manifestContents": null,
  "error": "Type = System.Threading.Tasks.TaskCanceledException\nMessage = The operation was canceled.\nSource = Microsoft.PWABuilder.ManifestFinder\nTask = \nCancellationToken = System.Threading.CancellationToken\nTargetSite = Void MoveNext()\nStackTrace =    at Microsoft.PWABuilder.ManifestFinder.ManifestService.LoadPage(Uri url) in /home/runner/work/pwabuilder-manifest-finder/pwabuilder-manifest-finder/Services/ManifestService.cs:line 581\n   at Microsoft.PWABuilder.ManifestFinder.ManifestService.Run(ManifestDetectionOptions options) in /home/runner/work/pwabuilder-manifest-finder/pwabuilder-manifest-finder/Services/ManifestService.cs:line 37\n   at Microsoft.PWABuilder.ManifestFinder.Function.Run(HttpRequest req, ILogger log, ExecutionContext context) in /home/runner/work/pwabuilder-manifest-finder/pwabuilder-manifest-finder/Function.cs:line 54\nHelpLink = \nHResult = -2146233029\nInnerException = ",
  "manifestContainsInvalidJson": false,
  "warnings": {

  },
  "additionalManifests": {

  }
}

Can you help me please ?