[error] com.fasterxml.jackson.databind.JsonMappingException: Scala module 2.11.4 requires Jackson Databind version >= 2.11.0 and < 2.12.0

[slisaasquatch]

Enable Jackson module

This sounds to me like you bumped up your Jackson version. Play comes with some Jackson dependencies including the Scala module, and you just need to include it explicitly like this: libraryDependencies += "com.fasterxml.jackson.module" %% "jackson-module-scala" % "2.12.1 or whatever version you have"