nl1dev

Got the same problem here, deactivating the plugin doesn’t solve the problem for me.

the full error log for my site:
Een fout van het type E_ERROR werd veroorzaakt op regelnummer 47 van het bestand /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623811/htdocs/wp-content/plugins/wordpress-seo/admin/links/class-link-watcher.php. Foutmelding: Uncaught TypeError: Argument 2 passed to WPSEO_Link_Watcher::save_post() must be an instance of WP_Post, null given, called in /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623811/htdocs/wp-includes/class-wp-hook.php on line 288 and defined in /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623811/htdocs/wp-content/plugins/wordpress-seo/admin/links/class-link-watcher.php:47
Stack trace:
#0 /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623811/htdocs/wp-includes/class-wp-hook.php(288): WPSEO_Link_Watcher->save_post(0, NULL)
#1 /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623811/htdocs/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623811/htdocs/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623811/htdocs/wp-includes/post.php(3951): do_action(‘save_post’, 0, NULL, false)
#4 /var/www/vhosts/144/335778/webspace/siteapps/WordPress-623