FreeBSD-13.0-RELEASE-amd64 "Missing operating system"

freebsd-questions:

I installed FreeBSD-13.0-RELEASE-amd64 on a Dell Latitude E6520 with 
firmware Settings -> General -> Boot Sequence -> Boot List Option -> 
Legacy (e.g. BIOS/MBR):

Welcome to FreeBSD		Boot Multi user
Welcome				Install
Keymap Selection		Continue with default keymap
Set Hostname			ragnar.tracy.holgerdanske.com
Distribution Selection		<none>
Partitioning			Auto (ZFS)
     Pool Type/Disks		stripe: 1 disk
				ada0 INTEL SSDSC2CW060A3
     Pool Name			ragnar_zroot
     Force 4K Sectors		YES
     Encrypt Disks		YES
     Partition Scheme		MBR (BIOS)
     Swap Size			2g
     Mirror Swap			YES
     Encrypt Swap		YES
     >>> Install			Proceed with installation
Encryption passphrase		********
Root password			********
Network Configuration		em0
Configure IPv4			Yes
Use DHCP			Yes
Configure IPv6			No
Search				tracy.holgerdanske.com
IPv4 DNS #1			192.168.5.1
IPv4 DNS #2			208.67.222.222
CMOS clock set to UTC		Yes
Time Zone				
     Region			America -- North and South
     Country or region		United States of America
     Zone			Pacific
Time & Date - month, year, day	<verify>
Time & Data - time		<verify>
Services to start at boot	sshd, ntpdate, ntpd, powerd
System hardening options	<none>
Add users			Yes
     User name			freebsd
     Full name			freebsd
     UID (leave empty for default)
				<empty>
     Login group [freebsd]	<empty>
     Login group is freebsd.  Invite user into other groups []?
				wheel
     Login class [default]	<empty>
     Shell (csh sh tcsh nologin) [sh]
				<empty>
     Home directory [/home/freebsd]
				<empty>
     Home directory permissions (leave empty for default)
				<empty>
     Use password-based authentication [yes]
				<empty>
     Use an empty password (yes/no) [no]
				<empty>
     Use a random password (yes/no) [no]
				<empty>
     Enter password		********
     Enter password again	********
     Lock out the account after creation [no]
				<empty>
Final configuration		Exit
Open shell			No
Complete			Reboot


When I boot, I see a black screen with 80x25 (?) text mode white letters:

     Missing operating system


Booting the installer (memstick) -> Boot Multi user -> Live CD -> root:

root@:~ # camcontrol devlist
<INTEL SSDSC2CW060A3 400i>         at scbus0 target 0 lun 0 (pass0,ada0)
<TEAC DVD-ROM DV18SA 3.0D>         at scbus1 target 0 lun 0 (cd0,pass1)
<AHCI SGPIO Enclosure 2.00 0001>   at scbus5 target 0 lun 0 (pass2,ses0)
<SanDisk Ultra Fit 1.00>           at scbus6 target 0 lun 0 (da0,pass3)

root@:~ geom part show -p ada0
=>     63  117231345    ada0  MBR  (56G)
        63       1985          - free - (993K)
      2048   29360128  ada0s1  freebsd [active] (14G)
   29362176  87869232          - free - (42G)

root@:~ geom part show -p ada0s1
geom: No such geom: ada0s1


The above command works on my FreeBSD 12.2-R system.


root@:~ # zpool status
ZFS filesystem version: 5
ZFS storage pool version: features support (5000)
no pools available

root@:~ # zpool import
    pool: bootpool
      id: 1019225291882433324
   state: ONLINE
  action: The pool can be imported by using its name or numeric identifer.
   config:

          bootpool                              ONLINE
            diskid/DISK-**redacted********s1    ONLINE


Suggestions?


David