Error when CentOS firewall is enabled

When xibo (1.8.7) was setup the CentOS firewall was disabled. I would like to enable that but I am getting the following error “Fatal Error - sorry this shouldn’t happen. SQLSTATE[HY000] [2002] Host is unreachable”

This is the current firewall rules from the server. Any thoughts as to what I can check? I can provide more details if you need them
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all – anywhere anywhere ctstate RELATED,ES TABLISHED
ACCEPT all – anywhere anywhere
INPUT_direct all – anywhere anywhere
INPUT_ZONES_SOURCE all – anywhere anywhere
INPUT_ZONES all – anywhere anywhere
DROP all – anywhere anywhere ctstate INVALID
REJECT all – anywhere anywhere reject-with icmp-h ost-prohibited

Chain FORWARD (policy ACCEPT)
target prot opt source destination
ACCEPT all – anywhere anywhere ctstate RELATED,ES TABLISHED
ACCEPT all – anywhere anywhere
FORWARD_direct all – anywhere anywhere
FORWARD_IN_ZONES_SOURCE all – anywhere anywhere
FORWARD_IN_ZONES all – anywhere anywhere
FORWARD_OUT_ZONES_SOURCE all – anywhere anywhere
FORWARD_OUT_ZONES all – anywhere anywhere
DROP all – anywhere anywhere ctstate INVALID
REJECT all – anywhere anywhere reject-with icmp-h ost-prohibited

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all – anywhere anywhere
OUTPUT_direct all – anywhere anywhere

Chain FORWARD_IN_ZONES (1 references)
target prot opt source destination
FWDI_public all – anywhere anywhere [goto]
FWDI_public all – anywhere anywhere [goto]

Chain FORWARD_IN_ZONES_SOURCE (1 references)
target prot opt source destination

Chain FORWARD_OUT_ZONES (1 references)
target prot opt source destination
FWDO_public all – anywhere anywhere [goto]
FWDO_public all – anywhere anywhere [goto]

Chain FORWARD_OUT_ZONES_SOURCE (1 references)
target prot opt source destination

Chain FORWARD_direct (1 references)
target prot opt source destination

Chain FWDI_public (2 references)
target prot opt source destination
FWDI_public_log all – anywhere anywhere
FWDI_public_deny all – anywhere anywhere
FWDI_public_allow all – anywhere anywhere
ACCEPT icmp – anywhere anywhere

Chain FWDI_public_allow (1 references)
target prot opt source destination

Chain FWDI_public_deny (1 references)
target prot opt source destination

Chain FWDI_public_log (1 references)
target prot opt source destination

Chain FWDO_public (2 references)
target prot opt source destination
FWDO_public_log all – anywhere anywhere
FWDO_public_deny all – anywhere anywhere
FWDO_public_allow all – anywhere anywhere

Chain FWDO_public_allow (1 references)
target prot opt source destination

Chain FWDO_public_deny (1 references)
target prot opt source destination

Chain FWDO_public_log (1 references)
target prot opt source destination

Chain INPUT_ZONES (1 references)
target prot opt source destination
IN_public all – anywhere anywhere [goto]
IN_public all – anywhere anywhere [goto]

Chain INPUT_ZONES_SOURCE (1 references)
target prot opt source destination

Chain INPUT_direct (1 references)
target prot opt source destination

Chain IN_public (2 references)
target prot opt source destination
IN_public_log all – anywhere anywhere
IN_public_deny all – anywhere anywhere
IN_public_allow all – anywhere anywhere
ACCEPT icmp – anywhere anywhere

Chain IN_public_allow (1 references)
target prot opt source destination
ACCEPT tcp – anywhere anywhere tcp dpt:ssh ctstat e NEW,UNTRACKED
ACCEPT udp – anywhere anywhere udp dpt:netbios-ns ctstate NEW,UNTRACKED
ACCEPT udp – anywhere anywhere udp dpt:netbios-dg m ctstate NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:netbios-ss n ctstate NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:microsoft- ds ctstate NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:http ctsta te NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:https ctst ate NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:5666 ctsta te NEW,UNTRACKED
ACCEPT udp – anywhere anywhere udp dpt:snmp ctsta te NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:9505 ctsta te NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:mysql ctst ate NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:webcache c tstate NEW,UNTRACKED
ACCEPT tcp – anywhere anywhere tcp dpt:50001 ctst ate NEW,UNTRACKED

Chain IN_public_deny (1 references)
target prot opt source destination

Chain IN_public_log (1 references)
target prot opt source destination

Chain OUTPUT_direct (1 references)
target prot opt source destination

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