I’m having a very similar issue. I just installed Yoast at https://www.girlpresidents.com and immediately started getting this:
Warning: preg_match_all(): Compilation failed: unknown option bit(s) set at offset 0 in /home/coconut2/public_html/wp-content/plugins/wordpress-seo/inc/class-wpseo-replace-vars.php on line 165
Warning: preg_match_all(): Compilation failed: unknown option bit(s) set at offset 0 in /home/coconut2/public_html/wp-content/plugins/wordpress-seo/inc/class-wpseo-replace-vars.php on line 165
Ideas?
