Configuration error

[WezG27]

Hi there, I need some help with an error one of our students is getting.

It says configuration Error

Here is the log file

2026-01-28_09h16m39s_Runtime.log

[dbuechel]

You have a network issue or then the LMS or web application of your institution has an issue:

2026-01-28 09:16:47.971 [11] - ERROR: [NetworkResourceLoader] Failed to check availability of 'sebs://exam.net/seb/start.seb?...' via HEAD request!

   Exception Message: An error occurred while sending the request.
   Exception Type: System.Net.Http.HttpRequestException

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at SafeExamBrowser.Configuration.DataResources.NetworkResourceLoader.<>c__DisplayClass11_0.<<Execute>b__0>d.MoveNext() in .\SafeExamBrowser.Configuration\DataResources\NetworkResourceLoader.cs:line 116
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at SafeExamBrowser.Configuration.DataResources.NetworkResourceLoader.Execute(HttpRequestMessage request) in .\SafeExamBrowser.Configuration\DataResources\NetworkResourceLoader.cs:line 120
   at SafeExamBrowser.Configuration.DataResources.NetworkResourceLoader.IsAvailable(Uri resource) in .\SafeExamBrowser.Configuration\DataResources\NetworkResourceLoader.cs:line 172

   Inner Exception Message: The underlying connection was closed: An unexpected error occurred on a send.
   Inner Exception Type: System.Net.WebException

   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)

   Inner Exception Message: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host.
   Inner Exception Type: System.IO.IOException

   at System.Net.Sockets.NetworkStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest, Boolean renegotiation)
   at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest, Boolean renegotiation)
   at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result)
   at System.Net.TlsStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback asyncCallback, Object asyncState)
   at System.Net.ConnectStream.WriteHeaders(Boolean async)

   Inner Exception Message: An existing connection was forcibly closed by the remote host
   Inner Exception Type: System.Net.Sockets.SocketException

   at System.Net.Sockets.Socket.BeginSend(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, AsyncCallback callback, Object state)
   at System.Net.Sockets.NetworkStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)

2026-01-28 09:16:47.971 [11] - DEBUG: [NetworkResourceLoader] HEAD request was not successful, trying GET request for 'https://exam.net/seb/start.seb?...'...
2026-01-28 09:16:48.028 [11] - ERROR: [NetworkResourceLoader] Failed to check availability of 'sebs://exam.net/seb/start.seb?...' via GET request!

   Exception Message: An error occurred while sending the request.
   Exception Type: System.Net.Http.HttpRequestException

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at SafeExamBrowser.Configuration.DataResources.NetworkResourceLoader.<>c__DisplayClass11_0.<<Execute>b__0>d.MoveNext() in .\SafeExamBrowser.Configuration\DataResources\NetworkResourceLoader.cs:line 116
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at SafeExamBrowser.Configuration.DataResources.NetworkResourceLoader.Execute(HttpRequestMessage request) in .\SafeExamBrowser.Configuration\DataResources\NetworkResourceLoader.cs:line 120
   at SafeExamBrowser.Configuration.DataResources.NetworkResourceLoader.IsAvailable(Uri resource) in .\SafeExamBrowser.Configuration\DataResources\NetworkResourceLoader.cs:line 189

   Inner Exception Message: The underlying connection was closed: An unexpected error occurred on a send.
   Inner Exception Type: System.Net.WebException

   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)

   Inner Exception Message: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host.
   Inner Exception Type: System.IO.IOException

   at System.Net.Sockets.NetworkStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest, Boolean renegotiation)
   at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest, Boolean renegotiation)
   at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result)
   at System.Net.TlsStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback asyncCallback, Object asyncState)
   at System.Net.ConnectStream.WriteHeaders(Boolean async)

   Inner Exception Message: An existing connection was forcibly closed by the remote host
   Inner Exception Type: System.Net.Sockets.SocketException

   at System.Net.Sockets.Socket.BeginSend(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, AsyncCallback callback, Object state)
   at System.Net.Sockets.NetworkStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)

2026-01-28 09:16:48.028 [11] - DEBUG: [NetworkResourceLoader] Can't load 'sebs://exam.net/seb/start.seb?...' since its URI scheme is not supported or the resource is unavailable.
2026-01-28 09:16:48.028 [11] - WARNING: [ConfigurationRepository] No resource loader found for 'sebs://exam.net/seb/start.seb?...'!
2026-01-28 09:19:14.965 [11] - WARNING: The configuration has failed!