How to allow IP range in firewall rule

[jdm.sona]

Hi,

I wanted to add an IP list range like this 192.168.0/255 to allow my office staff IP.

However, when I add this it shows invalid IP. Attached is the screenshot

[sdayman]

Try something like ip.src in {1.2.3.0/24 4.5.6.0/24}