Error: 404 Not Found

Sorry, the requested URL 'http://u.limo/wp-admin/admin-ajax.php?channel_id=social_wechat&action=xh_social_channel&tab=login_redirect_to_authorization_uri&xh_social_channel=44368a18eb&notice_str=7905517643&hash=c2bd5aa5ed90d59585999ef7e81fab7f&redirect_to=https%3A%2F%2Fu.limo%2Fpr%2Fpremiere-pro-2020%2F' caused an error:

Not found: '/wp-admin/admin-ajax.php'