Exception in thread "main" java.lang.Error: Unresolved compilation problem: Type mismatch: cannot convert from boolean to Admin Exception arise when trying to acces admin option (option 1 at main portal)
Issue: dev forgot to change getInstance method at Admin class. It was returning a boolean (used for debbuging) and it should return the current Admin instance. Code changed from: public static boolean getInstance() { boolean tryVariable = true; return tryVariable; } to: private static Admin inst = new Admin(); public static Admin getInstance() { return inst; }