A print plugin different from an application displaying an application screen on a terminal may be unable to display a screen over the application screen at timing unintended by a user. In such a case, the print plugin is unable to display a warning screen for notifying the user of a warning related to print processing, and the user is unable to be informed of occurrence of the warning. If the warning screen is unable to be displayed over the application screen, the print plugin instructs the terminal to issue a notification for calling the warning screen.