Debug Notice “Function add_submenu_page was called incorrectly”

On my site, the plugin reports the following debug message:

Notice: Function add_submenu_page was called incorrectly. The seventh parameter passed to add_submenu_page() should be numeric representing menu position.

In order to overcome this (minor) problem, I have modified the function (in file “…\ajax-bootmodal-login\inc\settings.php”)

alimir_bootModal_create_menu()

the statement

add_options_page(__( 'BootModal Login Settings', 'alimir' ),__( 'BootModal Login Settings', 'alimir' ), 'administrator', __FILE__, 'alimir_bootModal_settings_page', __FILE__);

to

add_options_page(__( 'BootModal Login Settings', 'alimir' ),__( 'BootModal Login Settings', 'alimir' ), 'administrator', __FILE__, 'alimir_bootModal_settings_page', /* __FILE__ */);

i.e. I have removed the sixth parameter, so the call falls back to the default parameter.

This helped, but unfortunately my patch may be overwritten by the next update of the plugin.