after I added the second FortiSwitch to Fortigate 60e , I lost the DHCP service ,wifi vla

[s3szy]

after I added the second FortiSwitch to Fortigate 60e ,  I lost the DHCP service ,wifi vlan .  

Now I lost the GUI browser to controll fortigate 60E .  I only can login it by console .  

I want to manully add the dhcp service ,  I got the error message : 

Error message：

    Regular(Ethernet) DHCP servers cannot be created on interfaces that do not have a static IP address.object set operator error, -236 discard the settingCommand fail. Return code -236