Hi, I've faced one interesting problem during the development. It's written that Spark 2.4.1 is compatible with Scala 2.12 (a minor version is not specified!). So I tried to deploy an application that was written on Scala 2.12.7 and I got a lot of serialization errors. Later I checked that Spark had been built on Scala 2.12.8 and I switched on it, and everything works well now. Isn't it an error that Spark 2.4.1 doesn't support other minor versions?