CreateBatchFailedException

When starting a new `BatchJob` width `BatchJob.StartNew` I regularly get a `CreateBatchFailedException` with an `InvalidOperationException` as `InnerException` and a message like `Can not create a background job for batch '12ee656b-b86b-42a2-98eb-0d17ebe14180', creation process returned 'null'.`

The StackTrace just points to `Hangfire.BatchAction.Create(Job job, IState state)`
What could this mean?

Start at BatchJob.StartNew and follow the call into Hangfire.BatchAction.Create(Job job, IState state). Inspect the CreateBatchFailedException and its InvalidOperationException inner exception, focusing on the reported null creation result. Done means identifying the failure's cause and documenting the corrective change or next diagnostic step.

Written by the indexing model from the issue text.