Website crashes if I use plugin

Hello, I’m using SiteOrigin. Into a row I clic SiteOrigin editor and I past the Everest Counter code which is [everest_counter id=”447″]. The thing is that when I refresh the website it crashes and I can’t scroll because the brouser (chrome, firefox, safari) has to be closed.

Any help please?

E_NOTICE: /wp-content/plugins/so-widgets-bundle/widgets/contact/contact.php:963 – Undefined index: _wpnonce
require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/premium/venture/templates/full-width-grid-page.php’), get_header, locate_template, load_template, require_once(/themes/premium/venture/header.php’), wp_head, do_action(‘wp_head’), WP_Hook->do_action, WP_Hook->apply_filters, jetpack_og_tags, apply_filters(‘jetpack_open_graph_tags’), WP_Hook->apply_filters, enhanced_og_image, Jetpack_Media_Summary::get, Jetpack_Media_Summary::get_excerpt, apply_filters(‘get_the_excerpt’), WP_Hook->apply_filters, wp_trim_excerpt, apply_filters(‘the_content’), WP_Hook->apply_filters, SiteOrigin_Panels->generate_post_content, SiteOrigin_Panels_Renderer->render, SiteOrigin_Panels_Renderer->render_row, SiteOrigin_Panels_Renderer->render_cell, SiteOrigin_Panels_Renderer->render_widget, SiteOrigin_Panels_Renderer->the_widget, SiteOrigin_Widget->widget, include(‘/plugins/so-widgets-bundle/widgets/contact/tpl/default.php’), SiteOrigin_Widgets_ContactForm_Widget->contact_form_action

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