The error is more famously known in SUPPORT as “Workstation cannot connect to the server” issue.
[ALL STATIONS DOWN but the SERVER IS UP]
Refer the problem to the customer's IT/Tech guy
You can search the web for a possible explaination or try this https://technet.microsoft.com/en-us/library/cc731991.aspx
As a form of a temporary workaround, you can create a map drive to the shared Windward folder by using the server's IP ADDRESS.
Go to HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Windward\System5