Try installing only the original version of Yoast SEO from wordpress plugin to see if it gives you the usual problem, then maybe add the premium persion laterI am getting the following error:
Warning: Undefined property: stdClass::$url in /wp-content/plugins/wordpress-seo/inc/class-addon-manager.php on line 760
Warning: Undefined property: stdClass::$renewalUrl in /wp-content/plugins/wordpress-seo/inc/class-addon-manager.php on line 775
Warning: Undefined property: stdClass::$version in /wp-content/plugins/wordpress-seo/inc/class-addon-manager.php on line 778
Warning: Undefined property: stdClass::$name in /wp-content/plugins/wordpress-seo/inc/class-addon-manager.php on line 779
Warning: Undefined property: stdClass::$lastUpdated in /wp-content/plugins/wordpress-seo/inc/class-addon-manager.php on line 781
Warning: Undefined property: stdClass::$storeUrl in /wp-content/plugins/wordpress-seo/inc/class-addon-manager.php on line 782
Warning: Undefined property: stdClass::$changelog in /wp-content/plugins/wordpress-seo/inc/class-addon-manager.php on line 785
in Plugins page in the admin panel. I wonder if anyone else is having the same problem or is it just me?
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UPDATE*: I found the error. Don't forget to update any Yoast addon you have.