Make sure the Smartsearch Content plugin is disabled
Then go to
/administrator/index.php?option=com_finder&view=index

The message is repeated twice, and the first one is not a correct link.

It is /administrator/%s instead of /administrator/index.php?option=com_plugins&task=plugin.edit&extension_id=441

Looked at history and could not find when this code was introduced.
see: https://github.com/joomla/joomla-cms/blob/3.7.x/administrator/components/com_finder/views/index/view.html.php#L87-L105

obviously, as the string needs a sprintf,

if (!$this->pluginState['plg_content_finder']->enabled)
        {
            JFactory::getApplication()->enqueueMessage(JText::_('COM_FINDER_INDEX_PLUGIN_CONTENT_NOT_ENABLED'), 'warning');
        }

is wrong.

But, I do not understand why the same message would anyway be repeated twice...