SMB using LDAP will not start when restoring a configuration on new system

In preparation to moving to new hardware with new boot media, I backed up the configuration of a working system and selected the option to save the passwords/secrets.  After I restored the configuration on the new hardware, SMB would not start and the following was recorded in samba4/log.smbd

  smbd version 4.10.13 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2019
[2020/06/24 09:35:15.164639,  1] ../../source3/profile/profile_dummy.c:30(set_profile_level)
  INFO: Profiling support unavailable in this build.
[2020/06/24 09:35:15.166769,  0] ../../source3/passdb/secrets.c:364(fetch_ldap_pw)
  fetch_ldap_pw: neither ldap secret retrieved!
[2020/06/24 09:35:15.166847,  0] ../../source3/passdb/pdb_ldap.c:6579(pdb_init_ldapsam_common)
  pdb_init_ldapsam_common: Failed to retrieve LDAP password from secrets.tdb
[2020/06/24 09:35:15.166905,  0] ../../source3/passdb/pdb_interface.c:180(make_pdb_method_name)
  pdb backend ldapsam:"ldap://xxx.xxx.xxx:389" did not correctly init (error was NT_STATUS_NO_MEMORY)

The SMB service was working correctly on the original hardware.  Entering the password in the web interface via "Directory Services/LDAP" did not resolve the problem.  There did not appear to be any other way to set the password via the web interface.  I was able to fix the problem in the shell via the command:

smbpasswd -w bind_pw

It appears that the configuration backup/restore does not save and/or restore the LDAP bind password in secrets.tdb.