Once again I get the Critical Error when (as a logged in admin) I click on WP Cerber in the left sidebar menu. This happens when wp is unable send emails (smtp is not configured yet). I’ve been here before, telling you about this. I sort of remember an email with an answer about this issue should be fixed in a future version. I’ve seen many new versions since, but no fix.
Please reply to me in this topic: Dashboard - Internal server error 500
WP Cerber works with or without SMTP. Try to disable your mailing plugin. I suspect it is not configured properly.