Form Recognizer nightly test runs are failing with:

Error message:
An unexpected error occurred.

Stack trace:
Error: An unexpected error occurred.
at toTrainingPollOperationState (/Users/runner/work/1/s/sdk/formrecognizer/ai-form-recognizer/dist-esm/src/lro/training.js:6:450)
at Object.poll (/Users/runner/work/1/s/sdk/formrecognizer/ai-form-recognizer/dist-esm/src/documentModelAdministrationClient.js:171:1068)
at processTicksAndRejections (internal/process/task_queues.js:95:5)
at Object.poll (/Users/runner/work/1/s/sdk/formrecognizer/ai-form-recognizer/src/lro/util/poller.ts:32:4)
at /Users/runner/work/1/s/sdk/formrecognizer/ai-form-recognizer/src/lro/util/poller.ts:37:79
at makeModel (/Users/runner/work/1/s/sdk/formrecognizer/ai-form-recognizer/test/public/training.spec.ts:227:23)
at async Promise.all (index 0)
at Context. (/Users/runner/work/1/s/sdk/formrecognizer/ai-form-recognizer/test/public/training.spec.ts:236:33)

For more details check here:

• https://dev.azure.com/azure-sdk/internal/_build/results?buildId=1153750&view=results