Got email from my website:
WordPress has 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.
An error of type E_ERROR was caused in line 4550 of the file xxxxxxxxxxxx/www/wp-content/plugins/wp-cerber/cerber-load.php. Error message: Uncaught Error: Call to undefined function syslog() in xxxxxxxxxxxx/www/wp-content/plugins/wp-cerber/cerber-load.php:4550
Stack trace:
#0 xxxxxxxxxxxx/www/wp-content/plugins/wp-cerber/cerber-load.php(1479): cerber_file_log(‘REMOVED_USERID’, ‘REMOVE_IP_ADDRESS’)
#1 xxxxxxxxxxxx/www/wp-content/plugins/wp-cerber/cerber-load.php(1180): cerber_login_failed(‘REMOVED_USERID’)
#2 xxxxxxxxxxxx/www/wp-content/plugins/wp-cerber/cerber-load.php(1108): cerber_authenticate(Object(WP_Error), ‘REMOVED_USERID’, ‘REMOVED_PASS’)
#3 xxxxxxxxxxxx/www/wp-includes/class-wp-hook.php(324): {closure}(Object(WP_Error), ‘REMOVED_USERID’, ‘REMOVED_PASS’)
#4 xxxxxxxxxxxx/www/wp-includes/plugin.php(205): WP_Hook->apply_filters(Object(WP_Error), Array)
#5 xxxxxxxxxxxx/www/wp-content/plugins/armember-membership/core/classes/class.arm_restriction.php(2250): apply_filters(‘authenticate’, NULL, ‘REMOVED_USERID’, ‘REMOVED_PASS’)
#6 xxxxxxxxxxxx/www/wp-includes/user.php(106): wp_authenticate(‘REMOVED_USERID’, ‘REMOVED_PASS’)
#7 xxxxxxxxxxxx/www/wp-login.php(1311): wp_signon(Array, true)
#8 {main}
thrown
Installed is WP Cerber 9.6.2 on Wordpress 6.4.3-de_DE
