sshd fails to run with gsocket with /undefinedfilename error

[DramaKing19]

Have an Ubuntu 16.04 network appliance that I've just upgraded to 20.04. I'm trying to install it as a service for sshd as explained in the examples, but it hasn't been working. Below is the output from testing it with 'gs -s ExampleSecretChangeMe /usr/sbin/sshd -D $SSHD_OPTS'. gs-netcat does work, but I'd prefer the ssh method.

GPL Ghostscript 9.50 (2019-10-15)
Copyright (C) 2019 Artifex Software, Inc.  All rights reserved.
This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
see the file COPYING for details.
Error: /undefinedfilename in (ExampleSecretChangeMe)
Operand stack:

Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push
Dictionary stack:
   --dict:728/1123(ro)(G)--   --dict:0/20(G)--   --dict:75/200(L)--
Current allocation mode is local
Last OS error: No such file or directory
GPL Ghostscript 9.50: Unrecoverable error, exit code 1

If I use gsocket instead of gs, I get this:

gsocket: =Encryption : SRP-AES-256-CBC-SHA-End2End (Prime: 4096 bits) /usr/sbin/sshd: error while loading shared libraries: /lib/x86_64-linux-gnu/libc.so: invalid ELF header

I know that libc.so is supposed to be a text file and not an actual static library, so this is weird.

In some cases the error mentions libssl.so.3 and libcrypto.so.3 and states "No such file or directory." I realized that this is due to Ubuntu 20.04 not supporting OpenSSL 3.0, but those files are located under /usr/local/lib64, so I don't know what's going on. Since $LD_LIBRARY_PATH is unset, I ran 'export LD_LIBRARY_PATH=/usr/local/lib64' and tried again, but it still failed with 'sshd: no host keys available -- exiting.'