Hey John,Nice to hear from you again.
"umass" would indicate some sort of USB, FreeBSD has this to say:USB 3.0 support is not compatible with some hardware, including Haswell (Lynx point) chipsets. If FreeBSD boots with a failed with error 19 message, disable xHCI/USB3 in the system BIOS.[1]
Hi John,Here's the 15.7.18 amd64 ISO: