It was that gosh-darn anomaly again, says SpaceX as smoke billows from Crew Dragon test site
https://www.theregister.co.uk/2019/04/23/space_round_up/
Roundup It has been an eventful past seven days in space what with SpaceX making a big cloud o' orange smoke, Cygnus docking, and veteran astronaut Owen Garriott taking his final journey into the black.
SpaceX's Crew Dragon appears to have suffered a significant setback as the spacecraft, previously sent to the International Space Station (ISS), suffered what NASA administrator Jim Bridenstine described as an "anomaly" during a static first test while perched on its Florida test stand.