I added the add_filter( ‘disable_wpseo_json_ld_search’, ‘__return_true’ ); and got the problems mentioned above with Webmaster Tools. 404’s (not found) on all our Sitemap links.
Within Yoast, XML Sitemaps resulted in a not found page.
I fixed it by disabling XML sitemaps completely on Yoast (unchecked the relevant checkbox)…Saved…and then rechecked it and Saved. It all worked and Webmaster Tools showed no errors.
Hope this will help.
Thanks to all for providing solutions and feedback.
