Problem
Discovery > Scan Jobs > Configure scan job > Click Start
Error - Cannot start Scan Job on appliance “as the appliance doesn't seem to be connected”
Note: from Settings > Appliances
The appliance appears to be online as normal
Solution
Discovery > Scan Jobs > Configure scan job > Configure > Scan Details
Check Under Appliance if the Appliance is showing as active or offline (Red)
There is an issue with the time configured on the appliance. In the example the customers appliance was 1hr behind. 1632297671183 = GMT: Wednesday, September 22, 2021 8:01:11.183 AM
Its the Linux command
sudo timedatectl set-ntp 0
sudo date --set "22 SEPTEMBER 2021 12:40 PM"
or whatever time the customer is running the command.
Vmware:Customer will need to check if the appliance does not have the a time sync with the vCenter where it is running, otherwise the time will be reverted back to the previous time.