According to the PrintTask | ArcGIS API for JavaScript 4.12 documentation it is not currently possible to print labels with FeatureLayers using a printing service published from ArcMap. Our project requires that labels be printed, so I switched over to a printing service publish from ArcGIS Pro...however the output is blank when I try to run it in 4.12, but not in a web app builder demo which runs in 3.x. Any clues?
... View more