When i have this plugin the theme didn't work correctly

When i have the coursepress on, the theme didn't work correctly, and in the shops anybody can see the products, when i have the plugin off, all works correctly.

This is the output when i have the plugin on, and the error, the plugin is for work with the theme, and no in viceversa mode.

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; WDS_OnPage has a deprecated constructor in /home/.../public_html/wp-content/plugins/wpmu-dev-seo/wds-files/wds-onpage/wds-onpage.php on line 8

Notice: Array to string conversion in /home/.../public_html/wp-content/themes/makery/framework/classes/themex.core.php on line 408