Short description:
The main quest "Your general was defeated" pops up the first time your general actually gets defeated. The quest can only be finished by "healing" your general on your home island, which means it has to be defeated there as well. If you haven't any bandits left on your island, your general can't be defeated anymore and thus this quest can never be completed. Fortunately it has no consequenses for your progress in the game.
Screenshot:
Not available
Possible cause:
Not completing the quest before you clear your home island
Prevention:
Complete the quest before you clear your home island.
Workaround:
None. (Contact Support and ask them if they can help out.)
Related:
Original thread(s): 1