Thanks for the 1.7.1 version! I’ve tried this on line 89 at plugins-compat.php and should work, but my main menu gets a little bit stuck when scrolling.
$wpseo_front->options = array_merge((array) $wpseo_front->options, (array) get_option( $opt ) );
Take a look if you can improve it. I’m going to go back to 1.7.1 by the way
https://www.ads-software.com/support/topic/wp-seo-by-yoast-172-update-polylang-version-164-errors?replies=7