The config file for the server-manager is /etc/httpd/admin-conf/httpd.conf.
To remove this address:
db configuration show httpd-admin
You should have something like this:
PermitPlainTextAccess=no
TCPPort=980
TKTAuthSecret=XXXXXXXXXXXXXXX
ValidFrom=X.X.X.X/255.255.255.255,41.0.0.0./255.255.255.255
access=localhost
status=enabled
You have your 41.0.0.0. IP which is not correct, and you may have some other addresses which are correct (X.X.X.X/255.255.255.255 here).
Just type
db configuration setprop httpd-admin ValidFrom 'X.X.X.X/255.255.255.255'
expand-template /etc/httpd/admin-conf/httpd.conf
sv t /service/httpd-admin
And your config should be back.
You should also report it in the bug tracker, the address should be checked before commiting this in the config