Class __PHP_Incomplete_Class has no unserializer Solved

After I installed Yoast SEO on my website, I submitted my SITEMAP to Google search console but unfortunately it was showing “Class __PHP_Incomplete_Class has no unserializer error” on my website Alakada Reloaded , I tried to fix the issue for more than 1 hour but no possible solution even on yoast website, they claimed that it is wordpress/hosting/other plugins that is causing the issue.

But at the end of the day the problem came from the activation of Yoast SEO Sitemap, when I disabled it and install google xml sitemap the problem solved and google crawled my website without any problem