title: What might cause the 'InternalServerError executing request' when running a manually triggered pipeline?
body: <p>The setup of the pipeline is a simple import from a <code>.csv</code> file stored in Azure Blob Storage to an Azure SQL database table.
  When I run the pipeline in Debug by using the 'Debug' button in the portal, the job finishes in 8 seconds.
  When I run the pipeline with the <code>Add trigger\Trigger now</code> button it runs for 20+ minutes and fails with the error 'InternalServerError executing request'.</p>
  
  <p>I recreated the pipeline and components from scratch and tried using a Data Flow (Preview) and a Copy Data, both give the same result.</p>
  
  <p>The expected output is a successful run of the pipeline, the actual output is the 'InternalServerError executing request' error.</p>