No changes to 23c developer VM, running under VB 7.0.6. Port forwarding for VM at defaults (1521:1521, etc).
SQLcl working fine with CDB and PDB inside the VM at the command line.
SD web working fine from host:

But can't get desktop SQL Developer 23.1 to connect to CDB or PDB in VM:

What am I missing or didn't configure correctly. Thanks.