CMI.Renderer.Interfaces.RenderExceptionDetailed: An error occured on PdfTools converter service: 2185300997: No worker session available
With this error, the PDF-ToolsConverter Service usualy does not recover by itself and has to be restarted.
   at CMI.Renderer.PdfToolsDocumentRenderer.PdfToolsDocumentRenderer.Render(IReadOnlyCollection`1 renderingParameters, Stream inputStream, String inputExtension)
   at CMI.Renderer.ExecutorOnFilesystemDocMgr.Program.Render(ILegacyRenderer renderer, String inputFilepath, String inputExtension, RenderingParameter[] parameters)