has_cap was called with an argument that is deprecated since version 2.0

This plugin is throwing the following error in the admin menu:

Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead.

The offending function is:

function tse_add_options_submenu() {
	$tse_options_page = add_submenu_page( 'options-general.php', 'Tango Smileys Extended: Options', 'Tango Smileys Extended', 10, 'tango-smileys-extended', 'tse_options' );
	add_action( "admin_print_scripts-$tse_options_page", 'tse_options_script' );
	add_action( "admin_print_styles-$tse_options_page", 'tse_options_style' );
}

Passing 10 as a permissions level is no more. This value should be a string. Since I’m the only user I’ve replaced 10 with ‘read’ and the error clears up nicely.

$tse_options_page = add_submenu_page( 'options-general.php', 'Tango Smileys Extended: Options', 'Tango Smileys Extended', 'read', 'tango-smileys-extended', 'tse_options' );

https://www.ads-software.com/extend/plugins/tango-smileys-extended/