I found the glitch in Stronghold Legends Arthur: Morgan Le Fay Mission

The Glitch is caused by a player building a wall and towers around the main structure of the castle, plus adding a gate

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Build your granary, supply building, barracks, armory, couple of houses, castle kitchen, pig farms, apple farm, and few other things.


Leave the gap open so that your workers can get through. Plus add wood camps, mines outside the walls. Doing so, you are allowing Morgan's armies raids your place. But make sure that you add Archers along the wall. To create a tower. /--\ <--- I created that with the walls.