Operator Panel Shows "No Callers" - Issabel 4.0.0.10

[dleventidis]

We have several queues defined in the system and all working as it supposed to.

The problem is that the Operator Panel Screen shows "No Callers" on the queue buttons.

Below are the versions installed in my system

Kernel
Linux(x86_64)-3.10.0-1062.el7.x86_64

Issabel
issabel-4.0.0-1
issabel-addons-4.0.0-5
issabel-agenda-4.0.0-3
issabel-asterisk-sounds-1.2.3-2
issabel-callcenter-4.0.0-5
issabel-email_admin-4.0.0-2
issabel-endpointconfig2-4.0.0-3
issabel-extras-4.0.0-4
issabel-fax-4.0.0-3
issabel-firstboot-4.0.0-4
issabel-fixfonts-1.0.0-0
issabel-framework-4.0.0-10
issabel-framework-themes-extra-4.0.0-10
issabel-geoip_key-1.0.0-1
issabel-license-4.0.0-4
issabel-my_extension-4.0.0-1
issabel-packet_capture-1.0.0-2
issabel-pbx-4.0.0-6
issabel-portknock-4.0.0-2
issabel-reports-4.0.0-3
issabel-security-4.0.0-10
issabel-system-4.0.1-0
issabel-theme_designer-1.0.0-1
issabel-two_factor_auth-1.0.0-1
issabel-upnpc-1.0.0-2
issabel-wizard-1.0.0-1

RoundCubeMail
RoundCubeMail-0.3.1-13

Mail
postfix-2.10.1-9.el7
cyrus-imapd-2.4.17-15.el7

IM
openfire-(not installed)-

IssablPBX
issabelPBX-2.11.0-48

Asterisk
asterisk16-16.7.0-1.el7
asterisk16-addons-16.7.0-1.el7
asterisk16-addons-bluetooth-16.7.0-1.el7
asterisk16-addons-core-16.7.0-1.el7
asterisk16-addons-mysql-16.7.0-1.el7
asterisk16-addons-ooh323-16.7.0-1.el7
asterisk16-configs-16.7.0-1.el7
asterisk16-core-16.7.0-1.el7
asterisk16-dahdi-16.7.0-1.el7
asterisk16-devel-16.7.0-1.el7
asterisk16-doc-16.7.0-1.el7
asterisk16-odbc-16.7.0-1.el7
asterisk16-resample-16.7.0-1.el7
asterisk16-sqlite3-16.7.0-1.el7
asterisk16-voicemail-16.7.0-1.el7
asterisk-codec-g729-1.0-0
asterisk-es-sounds-1.0.0-0.el7.centos
asterisk-fr-sounds-1.0.0-0.el7.centos
asterisk-perl-1.03-1.el7.centos
asterisk-pr-sounds-1.0-0
asterisk-pt_BR-sounds-1.0-0
asterisk-sounds-en-gsm-1.5-1.el7.centos

FAX
hylafax-4.3.11-1rh7
iaxmodem-1.3.0-2.el7.centos

DRIVERS
dahdi-2.11.1-1.el7.centos
rhino-0.99.7-0
wanpipe-util-(not installed)-