Вы обсуждаете проблему такого характера? https://ru.stackoverflow.com/questions/725014/%D0%9E%D1%88%D0%B8%D0%B1%D0%BA%D0%B0-%D0%BF%D1%80%D0%B8-%D0%BA%D0%BE%D0%BC%D0%BF%D0%B8%D0%BB%D1%8F%D1%86%D0%B8%D0%B8-%D0%BF%D1%80%D0%BE%D0%B5%D0%BA%D1%82%D0%B0-%D0%B2-intellij-idea-scala-errorscalac-no-scala-lib