Virtual IP address range box not showing to create new Virtual IP

Fortigate 100e

Firmware 6.2.3 build1066

Trying to setup virtual ip so I can control remote ubiquiti sites.  When I create a new Virtual IP for port forwarding, the address/range boxes only shows one box to enter the range.  The External IP address/range box has a messages stating add range using '-' between addresses, but the Mapped IP address/range does not allow input of second address.  Usually there is a second box.

I have tried setting it up on Forticloud, but that gui complains that the external IP address overlaps with the other virtual IP i have configured.

Has anyone seen this and know of a workaround or fix?

Thanks for your time.