Cannot open port 443 on Fortigate60E

FW-MAIN # show firewall vip 24x7 
config firewall vip
    edit "24x7"
        set uuid c9886ad2-03e9-51eb-091b-8c2431f4ac90
        set extip 176.74.140.8
        set mappedip "172.16.2.1"
        set extintf "wan1"
        set portforward enable
        set extport 443
        set mappedport 443
    next
end

FW-MAIN # show firewall policy 8
config firewall policy
    edit 8
        set status disable
        set name "Open HTTPS"
        set uuid 8dbe4ac8-031a-51eb-570c-9678721d149f
        set srcintf "wan1"
        set dstintf "internal"
        set srcaddr "all"
        set dstaddr "24x7"
        set action accept
        set schedule "always"
        set service "HTTPS"
        set logtraffic all
        set comments "Allow 24x7 monitoring"
        set nat enable
    next
end

Here is the list of the firewall rules:

Rule number 1:
FW-MAIN # show firewall policy 5
config firewall policy
    edit 5
        set name "Internal"
        set uuid 6a4dd636-ec62-51ea-9f46-29c5c9ce9afb
        set srcintf "internal" "VLAN16-WIFI" "VLAN12-INTERNAL"
        set dstintf "internal" "VLAN16-WIFI" "VLAN12-INTERNAL"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
    next
end
Rule 2:
FW-MAIN # show firewall policy 3
config firewall policy
    edit 3
        set name "Internal to WAN"
        set uuid 948ca2f2-8e7a-51e9-276c-73602409600d
        set srcintf "internal" "VLAN16-WIFI" "VLAN12-INTERNAL"
        set dstintf "wan1"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
        set utm-status enable
        set ssl-ssh-profile "certificate-inspection"
        set dnsfilter-profile "default"
        set nat enable
    next
end
Next rule:
FW-MAIN # show firewall policy 2
config firewall policy
    edit 2
        set name "GUEST-VLAN20-ALLOW"
        set uuid 306efa4a-8c40-51e9-d3dd-f71a581b638d
        set srcintf "GUEST-VLAN20"
        set dstintf "wan1"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
        set nat enable
    next
end
Next to last rule:
FW-MAIN # show firewall policy 8
config firewall policy
    edit 8
        set status disable
        set name "Open HTTPS"
        set uuid 8dbe4ac8-031a-51eb-570c-9678721d149f
        set srcintf "wan1"
        set dstintf "internal"
        set srcaddr "all"
        set dstaddr "24x7"
        set action accept
        set schedule "always"
        set service "HTTPS"
        set logtraffic all
        set comments "Allow 24x7 monitoring"
        set nat enable
    next
end
Last rule:
FW-MAIN # show firewall policy 3
config firewall policy
    edit 0
        set name "Implicit Deny"
        set srcintf "any"
        set dstintf "any"
        set srcaddr "all"
        set dstaddr "all"
        set action Deny
        set schedule "always"
        set service "ALL"
        set utm-status enable
    next
end

By following those steps, port 443 is still not opened. Can you help me with solving of this issue please?

Kind regards,

Adrián