Extension 2a should be numbered as 1a instead, as the module list being empty and the app showing an error message should not be occurring after point 2 of the use case, which is the app already having added the task. Instead, if an error is shown, the app should not have added the task and hence point 2 of the use case should not have been reached.
Extension 2a should be numbered as 1a instead, as the module list being empty and the app showing an error message should not be occurring after point 2 of the use case, which is the app already having added the task. Instead, if an error is shown, the app should not have added the task and hence point 2 of the use case should not have been reached.