Fixed. The ldap certificate is not marked as a required field, but it apparently is required so it worked as soon as I plugged in the certificate. If anyone from VMware is reading this, I would recommend that the ldap certificate field be marked as required.
I was able to download the ldap cert used by our organization by installing Git for Windows, opening Git Bash and running this openssl command:
echo -n | openssl s_client -connect ldapserver:636 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ldapserver.cer
Where ldapserver is either the fqdn or ip address of your organization's ldap server.
Thanks, all.