Cara memperbaiki halaman zimbraAdmin yang blank putih

[zimbra@mail ~]$ zmcontrol status
Host mail.wachid.co.id
        amavis                  Running
        antispam                Running
        antivirus               Running
        cbpolicyd               Running
        ldap                    Running
        logger                  Running
        mailbox                 Running
        memcached               Running
        mta                     Running
        opendkim                Running
        proxy                   Running
        service webapp          Running
        snmp                    Running
        spell                   Running
        stats                   Running
        zimbra webapp           Running
        zimbraAdmin webapp      Running
        zimlet webapp           Running
        zmconfigd               Running
[zimbra@mail ~]$

[zimbra@mail ~]$ zmcontrol stop zimbraAdmin
Host mail.dartair.co.id
        Stopping zmconfigd...Done.
        Stopping zimlet webapp...Done.
        Stopping zimbraAdmin webapp...Done.
        Stopping zimbra webapp...Done.
        Stopping service webapp...Done.
        Stopping stats...Done.
        Stopping mta...Done.
        Stopping spell...Done.
        Stopping snmp...Done.
        Stopping cbpolicyd...Done.
        Stopping archiving...Done.
        Stopping opendkim...Done.
        Stopping amavis...Done.
        Stopping antivirus...Done.
        Stopping antispam...Done.
        Stopping proxy...Done.
        Stopping memcached...Done.
        Stopping mailbox...Done.
        Stopping logger...Done.
        Stopping dnscache...Done.
        Stopping ldap...Done.

[root@mail zimbra]# mv /opt/zimbra/jetty/webapps/zimbraAdmin{,-back}
[root@mail zimbra]#
[root@mail zimbra]# cp -r jetty/webapps/zimbraAdmin /opt/zimbra/jetty/webapps/
[root@mail zimbra]#

[root@mail zimbra]# /opt/zimbra/libexec/zmfixperms -verbose
Fixing ownership and permissions on /opt/zimbra/conf
Fixing permissions on /opt/zimbra/conf/ca
Fixing permissions on /opt/zimbra/conf/ca/commercial_ca_1.crt
Fixing permissions on /opt/zimbra/conf/ca/commercial_ca_2.crt
Fixing permissions on /opt/zimbra/conf/ca/commercial_ca_3.crt
Fixing permissions on /opt/zimbra/conf/ca/ca.pem
Fixing ownership and permissions on /opt/zimbra/conf/ldap-canonical.cf
Fixing ownership and permissions on /opt/zimbra/conf/ldap-slm.cf
Fixing ownership and permissions on /opt/zimbra/conf/ldap-transport.cf
Fixing ownership and permissions on /opt/zimbra/conf/ldap-vad.cf
Fixing ownership and permissions on /opt/zimbra/conf/ldap-vam.cf
Fixing ownership and permissions on /opt/zimbra/conf/ldap-vmd.cf
Fixing ownership and permissions on /opt/zimbra/conf/ldap-vmm.cf
Fixing permissions and ownership on /opt/zimbra/conf/imapd.crt
Fixing permissions and ownership on /opt/zimbra/conf/nginx.crt
Fixing permissions and ownership on /opt/zimbra/conf/slapd.crt
Fixing permissions and ownership on /opt/zimbra/conf/smtpd.crt
Fixing permissions and ownership on /opt/zimbra/conf/imapd.key
Fixing permissions and ownership on /opt/zimbra/conf/nginx.key
Fixing permissions and ownership on /opt/zimbra/conf/slapd.key
Fixing permissions and ownership on /opt/zimbra/conf/smtpd.key
Fixing permissions and ownership on /opt/zimbra/conf/zmssl.cnf
Fixing ownership and permissions on /var/log/zimbra.log
Fixing ownership and permissions on /opt/zimbra/conf/crontabs
Fixing ownership and permissions on /opt/zimbra/common/lib/jylibs
Fixing ownership and permissions on /opt/zimbra/lib
Fixing ownership and permissions on /opt/zimbra/db
Fixing ownership and permissions on /opt/zimbra/data/sasl2/state
Fixing ownership and permissions on /opt/zimbra/data/amavisd
Fixing ownership and permissions on /opt/zimbra/jetty
Fixing ownership and permissions on /opt/zimbra/ssl
Fixing ownership and permissions on /opt/zimbra/data/ldap
Fixing ownership and permissions on /opt/zimbra/logger/db
Fixing ownership and permissions on /opt/zimbra/zmstat
Fixing postfix related permissions
Fixing ownership and permissions on /opt/zimbra/data/postfix
Set capability for /opt/zimbra/common/libexec/slapd
[root@mail zimbra]#

[zimbra@mail ~]$ zmcontrol start
Host mail.wachid.co.id
        Starting ldap...Done.
        Starting zmconfigd...Done.
        Starting logger...Done.
        Starting mailbox...Done.
        Starting memcached...Done.
        Starting proxy...Done.
        Starting amavis...Done.
        Starting antispam...Done.
        Starting antivirus...Done.
        Starting opendkim...Done.
        Starting cbpolicyd...Done.
        Starting snmp...Done.
        Starting spell...Done.
        Starting mta...Done.
        Starting stats...Done.
        Starting service webapp...Done.
        Starting zimbra webapp...Done.
        Starting zimbraAdmin webapp...Done.
        Starting zimlet webapp...Done.
[zimbra@mail ~]$