Thank you! I had scala-library 2.12.8 in my dependency tree (Probably a remnant from when I was testing with Scala 2.12.8).
I did the following to fix this issue. Removed scala-library 2.12.8 from my dependency tree and added the below dependency. <dependency> <groupId>org.scala-lang</groupId> <artifactId>scala-library</artifactId> <version>2.12.7</version> </dependency> -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/