exporting traffic error

i am trying to export the traffic log on this screen:
admin.php?page=cerber-traffic

but nothing happens, and i get an email from wordpress

Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, WP Cerber Security, Anti-spam & Malware Scan.

First, visit your website (https://www.saveatrain.com/blog/) and check for any visible issues. Next, visit the page where the error was caught (https://www.saveatrain.com/blog/blog/wp-admin/admin.php?page=cerber-traffic&cerber_nonce=b56807d809&cerber_admin_do=export&type=traffic) and check for any visible issues

but the site is still working , just nothing happens.

please help me resolve this

The page I need help with: [log in to see the link]