I see following message in the error.log:

[Wed Oct 25 07:41:25 2017] [error] [client 10.0.0.2] PHP Notice: Undefined variable: Settings in /var/www/www.example.com/com/inc/users/views/_group.form.php on line 238, referer: http://www.example.com/com/admin.php?ctrl=groups
[Wed Oct 25 07:41:25 2017] [error] [client 10.0.0.2] PHP Fatal error: Call to a member function get() on a non-object in /var/www/www.example.com/com/inc/users/views/_group.form.php on line 238, referer: http://www.example.com/com/admin.php?ctrl=groups
[Wed Oct 25 07:42:19 2017] [error] [client 10.0.0.2] PHP Notice: Undefined variable: Settings in /var/www/www.example.com/com/inc/users/views/_group.form.php on line 238, referer: http://www.example.com/com/admin.php?ctrl=groups&action=edit&tab=collection&grp_ID=8
[Wed Oct 25 07:42:19 2017] [error] [client 10.0.0.2] PHP Fatal error: Call to a member function get() on a non-object in /var/www/www.example.com/com/inc/users/views/_group.form.php on line 238, referer: http://www.example.com/com/admin.php?ctrl=groups&action=edit&tab=collection&grp_ID=8
[Wed Oct 25 07:42:35 2017] [error] [client 10.0.0.2] PHP Notice: Undefined variable: Settings in /var/www/www.example.com/com/inc/users/views/_group.form.php on line 238, referer: http://www.example.com/com/admin.php?blog=1&tab=general&ctrl=groups
[Wed Oct 25 07:42:35 2017] [error] [client 10.0.0.2] PHP Fatal error: Call to a member function get() on a non-object in /var/www/www.example.com/com/inc/users/views/_group.form.php on line 238, referer: http://www.example.com/com/admin.php?blog=1&tab=general&ctrl=groups

Is this related with b2e or with my old PHP-version?

Thanks.