When the button to create the mandatory items in language 'All' is pressed with KMFasTrans, a menu titled 'Menu All' is created with a menu item titled 'Menu Item-All' which is the default home page for the language 'All'. If the 'System - Language Filter' plugin is disabled then it is always redirected to the default menu item for the language 'All' whose title is 'Menu Item-All'. This also occurs when a default home page has not been defined for the language being displayed.
The problem is solved by enabling the 'System - Language Filter' plugin if it is not already, and ensuring that a default home page exists for the language being displayed.
