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i GOT MAIL FROM WORDPRESS, THOSE ARE THE ERRORS,I have deleted SEO Plugin causing errror, but what should i do with other errors, how to fix,

Error Details
=============
An error of type E_ERROR was caused in line 1279 of the file /home/ebookenc/public_html/wp-content/plugins/wordpress-seo-premium/inc/class-wpseo-replace-vars.php. Error message: Uncaught Error: Class ‘WPSEO_Replacement_Variable’ not found in /home/ebookenc/public_html/wp-content/plugins/wordpress-seo-premium/inc/class-wpseo-replace-vars.php:1279
Stack trace:
#0 /home/ebookenc/public_html/wp-content/plugins/wordpress-seo-premium/inc/class-wpseo-replace-vars.php(83): WPSEO_Replace_Vars::set_basic_help_texts()
#1 /home/ebookenc/public_html/wp-includes/class-wp-hook.php(288): WPSEO_Replace_Vars::setup_statics_once(”)
#2 /home/ebookenc/public_html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array)
#3 /home/ebookenc/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#4 /home/ebookenc/public_html/wp-settings.php(523): do_action(‘init’)
#5 /home/ebookenc/public_html/wp-config.php(92): require_once(‘/home/ebookenc/…’)
#6 /home/ebookenc/public_html/wp-load.php(37): require_once(‘/home/ebookenc/…’)
#7 /home/ebookenc/public_html/wp-admin/admin-ajax.php(22): require_once(‘/home/ebookenc/…’)
#8 {main}
thrown

thank you

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