the default credentials are guest / guest (all lowercase). Can you see the guest user in the UWM Users page?
If not, please go to VIRL Server > System configuration, and switch to the Users tab. Hit the re-apply button for the field enabling the primary account, then go through the system configuration process.
SSH to VIRL. virl (lower case) is user name, Password VIRL uppercase. What is your Eth0? How did you configure your interfaces in VMWare?
login as: virl
Welcome to Ubuntu 16.04.4 LTS (GNU/Linux 4.4.0-79-generic x86_64)
System information as of Thu Jan 10 16:44:38 GMT 2019
System load: 0.02 IP address for eth0: 172.16.5.3
Usage of /: 29.7% of 69.61GB IP address for br1: 172.16.1.254
Memory usage: 6% IP address for br3: 172.16.3.254
Swap usage: 0% IP address for br2: 172.16.2.254
Processes: 384 IP address for br4: 172.16.10.250
Users logged in: 1 IP address for docker0: 172.17.0.1
Graph this data and manage this system at: