I've installed the latest that I could find "s5-flex-menu-plugin_1.1.3" but still get warnings from Joomla that it must be updated. Is the J4 version of this plugin ready? It's used in about 12 of my websites.
headcake Hi, The plugin is ready for J4. You should try to uninstall S5 Flex Menu in extensions manager, then reinstall it. The problem should be fixed then.