When the class is declared in a package deal for example com.acme.illustration, then you should use the full classname which include all lessons and interfaces in the superclass hierarchy (e.g. see Java class is existing in classpath but startup fails with Mistake: Couldn't obtain or load key course) That very https://artwork94769.blog2news.com/34430533/new-step-by-step-map-for-uninterruptible-power-supply-ups