Bug: has_cap was called with an argument that is deprecated

In lib/Advman/Admin.php

add_object_page(__('Ads', 'advman'), __('Ads', 'advman'), 8, 'advman-list', array('Advman_List','process'), ADVMAN_URL . '/images/advman-menu-icon.svg');
        $list_hook = add_submenu_page('advman-list', __('All Ads', 'advman'), __('All Ads', 'advman'), 8, 'advman-list', array('Advman_List','process'));
        $analytics_hook = add_submenu_page('advman-list', __('Analytics', 'advman'), __('Analytics', 'advman'), 8, 'advman-analytics', array('Advman_Analytics','process'));
        add_submenu_page('advman-list', __('Create New Ad', 'advman'), __('Create New', 'advman'), 8, 'advman-ad-new', array('Advman_Admin','create'));
        add_submenu_page(null, __('Edit Ad', 'advman'), __('Edit', 'advman'), 8, 'advman-ad', array('Advman_Admin','edit_ad'));
        add_submenu_page(null, __('Preview Ad', 'advman'), __('Preview', 'advman'), 8, 'advman-ad-preview', array('Advman_Admin','preview_ad'));
        add_submenu_page(null, __('Edit Network', 'advman'), __('Edit', 'advman'), 8, 'advman-network', array('Advman_Admin','edit_network'));
        add_options_page(__('Ads', 'advman'), __('Ads', 'advman'), 8, 'advman-settings', array('Advman_Admin','settings'));

In each function call ‘8’ should be replaced with something like ‘manage_options’ or (other appropriate capability)

https://wordpress.org/plugins/advertising-manager/