Sitio web wordpress con problemas

Tenemos un sitio web que esta con problemas,

Deprecated: Array and string offset access syntax with curly braces is deprecated in /home/feriant1/public_html/wp-content/themes/porto/inc/functions/general.php on line 178

Deprecated: Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /home/feriant1/public_html/wp-content/plugins/js_composer/include/classes/editors/class-vc-frontend-editor.php on line 673

Notice: Trying to get property 'ID' of non-object in /home/feriant1/public_html/wp-includes/class-wp-query.php on line 4070

Notice: Trying to get property 'post_title' of non-object in /home/feriant1/public_html/wp-includes/class-wp-query.php on line 4072

Notice: Trying to get property 'post_name' of non-object in /home/feriant1/public_html/wp-includes/class-wp-query.php on line 4074

Notice: Trying to get property 'post_type' of non-object in /home/feriant1/public_html/wp-includes/class-wp-query.php on line 4222

Fatal error: Uncaught Error: Call to undefined method Elementor\Widgets_Manager::register() in /home/feriant1/public_html/wp-content/plugins/gs-logo-slider/includes/integrations/gs-logo-integration-elementor.php:35 Stack trace: #0 /home/feriant1/public_html/wp-includes/class-wp-hook.php(292): GS_Logo_Slider_Integration_Elementor->register_elementor_widget(Object(Elementor\Widgets_Manager)) #1 /home/feriant1/public_html/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters('', Array) #2 /home/feriant1/public_html/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #3 /home/feriant1/public_html/wp-content/plugins/elementor/includes/managers/widgets.php(99): do_action('elementor/widge...', Object(Elementor\Widgets_Manager)) #4 /home/feriant1/public_html/wp-content/plugins/elementor/includes/managers/widgets.php(235): Elementor\Widgets_Manager->init_widgets() #5 /home/feriant1/public_html/wp-content/plugins/elementor/core/files/css/global-css.php(119): Elementor\Widgets_Manager->get_widget_types() #6 /home/feriant1/pu in /home/feriant1/public_html/wp-content/plugins/gs-logo-slider/includes/integrations/gs-logo-integration-elementor.php on line 35