Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class "FU_WPRSS\Src\Core\Deactivator" not found in /home/grenews/public_html/wp-includes/class-wp-hook.php:324 Stack trace: #0 /home/grenews/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #1 /home/grenews/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /home/grenews/public_html/wp-admin/includes/plugin.php(826): do_action('deactivate_fu-w...', false) #3 /home/grenews/public_html/wp-content/plugins/fu-wprss/src/admin/Admin.php(143): deactivate_plugins('fu-wprss/fu-wpr...') #4 /home/grenews/public_html/wp-content/plugins/fu-wprss/src/admin/Admin.php(158): FU_WPRSS\admin\Admin->check_aggregator() #5 /home/grenews/public_html/wp-includes/class-wp-hook.php(324): FU_WPRSS\admin\Admin->check_plugin_dependencies('') #6 /home/grenews/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #7 /home/grenews/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #8 /home/grenews/public_html/wp-settings.php(578): do_action('plugins_loaded') #9 /home/grenews/public_html/wp-config.php(105): require_once('/home/grenews/p...') #10 /home/grenews/public_html/wp-load.php(50): require_once('/home/grenews/p...') #11 /home/grenews/public_html/wp-blog-header.php(13): require_once('/home/grenews/p...') #12 /home/grenews/public_html/index.php(17): require('/home/grenews/p...') #13 {main} thrown in /home/grenews/public_html/wp-includes/class-wp-hook.php on line 324