Unable to add CIDR to Firewall Rule

Hi. Trying to add CIDR with dashboard UI to Firewall Rules and get this error:

Filter parsing error (1:13):
(ip.src in {})
^^^^^^^^^^^ host part of address was not zero

I checked is valid CIDR address for subnet –

Any ideas why it doesn’t allow this CIDR to be added?

Try adding It seems Cloudflare wouldnt like CIDR addresses which start in the middle of the range, but expects the start address.

Changed CIDR to and issue gone!

Thanx, @sandro. My provider sent me original CIDR starting in the middle of the range, I will let them know not to do this.