[NSFW] Alert “Your webseite ha a technical problem”

Hello,
I get irregularly the mail “Your website has a technical problem” and the reference to “WP Cerber Security”.

Installed is WP 6.2.2 and WP Cerber Security 9.5.4.

Page where the error occurred: https:/…../wp-login.php

The mail from WordPress contains the following error details at the end

An error of type E_ERROR was caused on line 4330 of file /…….//www/wp-content/plugins/wp-cerber/cerber-load.php. Error message: Uncaught Error: Call to undefined function syslog() in /…….//www/wp-content/plugins/wp-cerber/cerber-load.php:4330
Stack trace:

0 /…….//www/wp-content/plugins/wp-cerber/cerber-load.php(1421): cerber_file_log(‘admin’, ‘148.72.214.245’)

1 /…….//www/wp-content/plugins/wp-cerber/cerber-load.php(1121): cerber_login_failed(‘admin’)

2 /…….//www/wp-content/plugins/wp-cerber/cerber-load.php(1054): cerber_authenticate(Object(WP_Error), ‘admin’, ‘123456’)

3 /…….//www/wp-includes/class-wp-hook.php(308): {closure}(Object(WP_Error), ‘admin’, ‘123456’)

4 /…….//www/wp-includes/plugin.php(205): WP_Hook->apply_filters(Object(WP_Error), Array)

5 /…….//www/wp-content/plugins/armember-membership/core/classes/class.arm_restriction.php(2188): apply_filters(‘authenticate’, NULL, ‘admin’, ‘123456’)

6 /…….//www/wp-includes/user.php(95): wp_authenticate(‘admin’, ‘123456’)

7 /…….//www/wp-login.php(1231): wp_signon(array, true)

8 {main}

Any ideas?