No engine found. Your build might have failed. Aborting. [predictionio]

Please click this link to see the exact log i am seeing after running pio build. It fails as it can't find engine. Help would be much appreciated

I meet the same problem, because I specified scala.version=2.11.8 when I build PredictionIO but the engine template I used was build with scala 2.10.

so I edit build.sbt file under engine's folder, and add scalaVersion := "2.11.8", re-run the build command(pio build --verbose), then everything build finished successfully.