Sitemaps ping to Google is deprecated:

cf. https://developers.google.com/search/blog/2023/06/sitemaps-lastmod-ping

Author: yasulab

config/sitemap.rb

@@ -4,7 +4,10 @@
 # NOTE: Ping to search engines is outdated
 # Bingのping APIは廃止され、IndexNowに移行 https://github.com/kjvarga/sitemap_generator/issues/391
 # Google も非推奨になった: https://developers.google.com/search/blog/2023/06/sitemaps-lastmod-ping
-#SitemapGenerator::Sitemap.search_engines = {}
+
+# TODO: This is workaround. Will be deleted in the future release.
+# https://github.com/kjvarga/sitemap_generator/issues/432
+SitemapGenerator::Sitemap.search_engines.delete(:google)
 
 SitemapGenerator::Sitemap.create do
   # Put links creation logic here.