Error Message from WordPress

Hi, 

I got this Error Message from WordPress.?
The site is online but I do not understand why we got this notification.
What can the problem be caused by?

Error Details

=============

An error of type E_ERROR was caused in line 260 of the file /html/wordpress/wp-content/plugins/woocommerce/src/Packages.php. Error message: Uncaught Error: Call to a member function get_column_count() on null in /html/wordpress/wp-content/plugins/woocommerce/src/Packages.php:260

Stack trace:

#0 /html/wordpress/wp-includes/class-wp-hook.php(326): Automattic\WooCommerce\Packages::display_notice_for_merged_plugins(‘…’)

#1 /html/wordpress/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array)

#2 /html/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#3 /html/wordpress/wp-admin/includes/class-wp-plugins-list-table.php(1491): do_action(‘…’, ‘…’, Array, ‘…’)

#4 /html/wordpress/wp-admin/includes/class-wp-plugins-list-table.php(711): WP_Plugins_List_Table->single_row(Array)

#5 /html/wordpress/wp-admin/includes/class-wp-list-table.php(1712): WP_Plugins_List_Table->display_rows()

#6 /html/wordpress/wp-admin/includes/class-wp-list-table.php(1639): WP_List_Table->display_rows_or_placeholder()

#7 /html/wordpress/wp-admin/includes/ajax-actions.php(4834): WP_List_Table->display()

#8 /html/wordpress/wp-includes/class-wp-hook.php(324): wp_ajax_search_plugins(”)

#9 /html/wordpress/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array)

#10 /html/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#11 /html/wordpress/wp-admin/admin-ajax.php(192): do_action(‘…’)

#12 {main}

?thrown

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