How do we troubleshoot / get support for Submission API errors?

[riverar]

Our pipeline has been failing for a few weeks now for unknown reasons. I opened a ticket for Dev Center support on October 29 but haven't heard back (which is not unusual for that team).

Any thoughts on how to move forward here? We're blocked.

...
/  Elapsed: 5 second(s) [Replacing the content of Submission: 1152921505695514494 for App: ***]
-  Elapsed: 5 second(s) [Replacing the content of Submission: 1152921505695514494 for App: ***]
\  Elapsed: 5 second(s) [Replacing the content of Submission: 1152921505695514494 for App: ***]
|  Elapsed: 5 second(s) [Replacing the content of Submission: 1152921505695514494 for App: ***]
DONE (FAILED) - Operation took 5 second(s) [Replacing the content of Submission: 1152921505695514494 for App: ***]
VERBOSE: 2022-11-06 00:36:07 : runneradmin : MS-CorrelationId: 13914016-f866-4e03-922f-4035ede7e8ca
Write-Log : 2022-11-06 00:36:07 : runneradmin : Write-Log : 2022-11-06 00:36:07 : runneradmin : 500 | Internal Server 
Error
The remote server returned an error: (500) Internal Server Error.
InternalServerError : An internal server error occurred while processing the operation.
MS-CorrelationId: 13914016-f866-4e03-922f-4035ede7e8ca
At C:\Program Files\WindowsPowerShell\Modules\StoreBroker\1.21.0\StoreBroker\StoreIngestionApi.psm1:2116 char:17
+                 Write-Log -Message $newLineOutput -Level Error
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Write-Log

At C:\Program Files\WindowsPowerShell\Modules\StoreBroker\1.21.0\StoreBroker\StoreIngestionApplicationApi.ps1:1354 
char:9
+         Write-Log -Exception $_ -Level Error
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Write-Log

[riverar]

From manage.devcenter.microsoft.com/v1.0/my/applications/.../submissions/... directly:

{"code":"InternalServerError","data":[],"details":[],"innererror":{"code":"UnknownInternalFailure","data":[],"details":[],"message":"The service has encountered an unknown internal server error: "},"message":"An internal server error occurred while processing the operation.","source":"Ingestion Api"}

[riverar]

Only option is to hack/slash the submission JSON or somehow get in touch with the Ingest API owners. Will close as there's nothing to do here.