Proxy Tunnel Request Failed With Status Code "502"

[arisarnado]

Hello UiPath Forum,

We encountered a status code “502” when trying to send the following Post Request.

The following log snippets were also found:
UiPath Studio Log:

14:09:26.9881 => [ERROR] [UiPath.Studio.Project] [1] System.Net.Http.HttpRequestException: The proxy tunnel request to proxy ‘’ failed with status code ‘502’."
at System.Net.Http.HttpConnectionPool.EstablishProxyTunnelAsync(Boolean async, HttpRequestHeaders headers, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.AddHttp11ConnectionAsync(HttpRequestMessage request)
at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.GetHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.AuthenticationHelper.SendWithAuthAsync(HttpRequestMessage request, Uri authUri, Boolean async, ICredentials credentials, Boolean preAuthenticate, Boolean isProxyAuth, Boolean doRequestAuth, HttpConnectionPool pool, CancellationToken cancellationToken)
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
at UiPath.MLServices.ModelConnectionService.PostModelRequestAysnc(String baseServiceUrl, String input, String mlSkillName, TimeSpan timeout, CancellationToken cancellationToken)
at UiPath.MLServices.ModelConnectionService.PostRequestWithAccessUriAsync(String accessUri, String inputData, String inputType, String mlSkillName, TimeSpan timeout, CancellationToken cancellationToken)

We found the following existing ticket similar to our issue, but we would like to ask for second opinion:

"Post request with accessUri" Error while doing test for Sentiment Analysis Skill in Studio

Hi @Jeremy_Tederry Yes I have tried to access the links. As you mentioned when I click on “aifabric.deskover.com” getting this unregistered page Can I know how to resolve this? [image]