"Did not find product ID" with SurfaceDevCenterManager v1.0.0.1

Hi,
our since-then untouched build server was not able anymore to submit our driver for Microsofts attestation signing: (last successful submission was September 2021) now it fails at the SDCM stage with:

Time Elapsed 00:00:03.66
Attestation Submission

Create Product

Create JSON
Submit
Did not find product ID
SurfaceDevCenterManager v1.0.0.1
Create Option
Unhandled Exception:
System.OperationCanceledException: The operation was canceled.
at System.Net.Http.HttpClient.HandleFinishSendAsyncError(Exception e, CancellationTokenSource cts)
at System.Net.Http.HttpClient.d__58.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Microsoft.Devices.HardwareDevCenterManager.DevCenterApi.DevCenterHandler.d__10.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Devices.HardwareDevCenterManager.DevCenterApi.DevCenterHandler.d__111.MoveNext() — End of stack trace from previous location where exception was thrown — at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Devices.HardwareDevCenterManager.DevCenterApi.DevCenterHandler.d__131.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Devices.HardwareDevCenterManager.DevCenterApi.DevCenterHandler.d__15.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at SurfaceDevCenterManager.Program.d__6.MoveNext() in <…>:line 227
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at SurfaceDevCenterManager.Program.Main(String args) in <…>:line 60
Last Command:
ERROR (DevCenterErrorDetails)
Code:
HttpCode:
Message:
Correlation Id: …
Request Id: …
Method: POST
Url: https://manage.devcenter.microsoft.com/v2.0/my/hardware/products
Content: {“productName”:“$project_Attestation”,“testHarness”:“Attestation”,“announcementDate”:“2022-02-23T10:28:02”,“deviceMetadataIds”:null,“firmwareVersion”:“0”,“deviceType”:“internal”,“isTestSign”:false,“isFlightSign”:false,“marketingNames”:null,“selectedProductTypes”:{“windows_v100_RS4”:“Unclassified”},“requestedSignatures”:[“WINDOWS_v100_X64_TH2_FULL”,“WINDOWS_v100_X64_RS1_FULL”,“WINDOWS_v100_X64_RS2_FULL”,“WINDOWS_v100_X64_RS3_FULL”,“WINDOWS_v100_X64_RS4_FULL”,“WINDOWS_v100_X64_RS5_FULL”,“WINDOWS_v100_X64_19H1_FULL”,“WINDOWS_v100_X64_VB_FULL”],“additionalAttributes”:null,“packageType”:null}
Correlation Id: 7a6651b5-10cd-464e-ad1e-005819e862b3
Return: -2 (UNHANDLED_EXCEPTION)
-1

Any hints or ideas are highly appreciated,
thanks,
Hagen.