Fatal error: Uncaught Error: Call to a member function get() on null in

Hello,
Once the plugin is turned on, I get the following error when a customer accesses a product, page or post found in a search engine.

At the moment I have turned it off, as this is a serious problem for the SEO part of my site and for our clients.

Once turned off, this problem is not present.
Ask for assistance.

Fatal error: Uncaught Error: Call to a member function get() on null in /home/xxxxxx/public_html/wp-includes/query.php:28 Stack trace: #0 /home/xxxxxx/public_html/wp-includes/general-template.php(1288): get_query_var('m') #1 /home/xxxxxx/public_html/wp-content/plugins/wp-statistics/includes/class-wp-statistics-referred.php(70): wp_title('', false) #2 /home/xxxxxx/public_html/wp-content/plugins/wp-statistics/includes/class-wp-statistics.php(331): WP_STATISTICS\Referred::get() #3 /home/xxxxxx/public_html/wp-content/plugins/wp-statistics/includes/class-wp-statistics.php(115): WP_Statistics->instantiate() #4 /home/xxxxxx/public_html/wp-includes/class-wp-hook.php(287): WP_Statistics->plugin_setup('') #5 /home/xxxxxx/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #6 /home/xxxxxx/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #7 /home/xxxxxx/public_html/wp-settings.php(409): do_action('plugins_loaded') #8 /home/xxxxxx/public_html/wp-config.php(121): req in /home/xxxxxx/public_html/wp-includes/query.php on line 28