parent does not exist!
line 884 of /lib/adminlib.php: call to debugging()
line 27 of /local/contrib/settings.php: call to admin_category->add()
line 484 of /admin/settings/plugins.php: call to include()
line 5879 of /lib/adminlib.php: call to require()
line 2910 of /lib/navigationlib.php: call to admin_get_root()
line 2818 of /lib/navigationlib.php: call to settings_navigation->load_administration_settings()
line 601 of /lib/pagelib.php: call to settings_navigation->initialise()
line 617 of /lib/pagelib.php: call to moodle_page->magic_get_settingsnav()
line 132 of /blocks/settings/block_settings.php: call to moodle_page->__get()
line 280 of /blocks/moodleblock.class.php: call to block_settings->get_content()
line 232 of /blocks/moodleblock.class.php: call to block_base->formatted_contents()
line 920 of /lib/blocklib.php: call to block_base->get_content_for_output()
line 972 of /lib/blocklib.php: call to block_manager->create_block_contents()
line 349 of /lib/blocklib.php: call to block_manager->ensure_content_created()
line 3 of /theme/base/layout/frontpage.php: call to block_manager->region_has_content()
line 654 of /lib/outputrenderers.php: call to include()
line 612 of /lib/outputrenderers.php: call to core_renderer->render_page_layout()
line ? of unknownfile: call to core_renderer->header()
line 1279 of /lib/setuplib.php: call to call_user_func_array()
line ? of unknownfile: call to bootstrap_renderer->__call()
line 89 of /index.php: call to bootstrap_renderer->header()

Hmmm the node localplugins is only ever added to the page is the user has the site config cap, basically we need to adhere to that check as well and only attempt to add to settings if the user has site config cap