Guest WiFi not working with DHCP disable

Hello,

I am using my "server" for handling DHCP requests, in the past i used my router to perform this task.

After disabling my DHCP server on the router i found out my guest WiFi is not working anymore. It seems it keeps searching for a DHCP server to get an IP but i am not sure whether this is the problem.

Could someone help me with this problem and hand me a solution or alternative, i really would like my guest wifi to work.

Thanks in advance.