JavaScript.Eval requires at least two packages to be installed.
The first package is, JavaScript.Eval.
The JavaScript.Eval package is the managed wrapper that we've build to access to native library.
In order for this library to work properly you'll need to install one of the following (or all three) platform specific native binaries.
JavaScript.Eval.x64-Linux-Native
JavaScript.Eval.x64-Windows-Native
JavaScript.Eval.x64-Mac-Native