The pak mounting procedure is independent from what contents are inside the pak or from which project it originates.
If the mounting succeeds can depend on the engine version where you are loading it from and the engine version where the pak was created. There are also some settings which can interfere with it.
If the content from the pak can be used within your project where it loads from can also depend on the version and on some engine settings. In the end it’s up to Unreal. This plugin just wraps functions around the engine’s one, so that it’s easier to use.