Network Configuration Incorrect - Digital Forensics Professional

Hi Team,
Anyone having issues connecting to the VNC machine?
I pinged the IP address provided 172.16.81.100 and got a request timeout error.
Also, I did a scan to see all available hosts but the results said “0 hosts up”.
I was able to connect to it 2 days prior but the credentials provided did not work “AdminELS | P3n#31337@ELS!”
Anyone who is able to connect successfully please share how you were able to do so.