NP_NULL_PARAM_DEREF

Method call in LessonSource.makeSource(WebSession) passes null for unconditionally dereferenced parameter of String.replaceAll(String, String) Called method String.replaceAll(String, String) Argument 1 might be null but must not be null Local variable named source Method invoked at LessonSource.java:[line 138] Known null at LessonSource.java:[line 128] Known null at LessonSource.java:[line 133]