Referrers and dashboard not working again

Dear Greg,

First of all – thanks for the great plugin and for the support here. A few months ago I had a problem with my empty dashboard and the solution was to convert the DB (in chunks).

The similar problem returned. My dashboard is empty and I can access all the subpages except the referrers. Can it be the problem with the memory limit?

In my php error log I found lot of errors like:
[03-Nov-2015 12:20:21 UTC] B???…d Lock wait timeout exceeded; try restarting transaction bazy danych WordPressa podczas wykonywania zapytania DELETE FROM wp_statistics_useronline WHERE timestamp < ‘1446556740’ wys??anego przez shutdown_action_hook, do_action(‘shutdown’), call_user_func_array, wp_statistics_shutdown_action, Hits->Check_online, Hits->Delete_user
[03-Nov-2015 12:20:27 UTC] B???…d Lock wait timeout exceeded; try restarting transaction bazy danych WordPressa podczas wykonywania zapytania DELETE FROM wp_statistics_useronline WHERE timestamp < ‘1446556746’ wys??anego przez shutdown_action_hook, do_action(‘shutdown’), call_user_func_array, wp_statistics_shutdown_action, Hits->Check_online, Hits->Delete_user
[03-Nov-2015 12:20:42 UTC] B???…d Lock wait timeout exceeded; try restarting transaction bazy danych WordPressa podczas wykonywania zapytania INSERT INTO wp_options (option_name, option_value, autoload) VALUES (‘_transient_doing_cron’, ‘1446553191.3770051002502441406250’, ‘yes’) ON DUPLICATE KEY UPDATE option_name = VALUES(option_name), option_value = VALUES(option_value), autoload = VALUES(autoload) wys??anego przez require(‘wp-blog-header.php’), require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), do_action(‘init’), call_user_func_array, wp_cron, spawn_cron, set_transient, add_option

Can it be related? I will also open a ticket with my hosting company to ask them about those timeouts.

Thank you in advance.

https://www.ads-software.com/plugins/wp-statistics/