I have also the same issue. I am using v5.8.4 on windows.
Adminstrator Application (DemoProject) > Instances > Default > Server > Stats > Server State: File not found, Server Log: File not found.
Ofcourse when i start the instance in the web browser, i can’t login: Server not available.
For the directory you mentioned above C:\SCADA\ScadaServer\Log\ is empty in my case
How can i fix this?
P.S. I tried with the prerelease v6 and the server was working normally, but there were many other bugs so i decided to go back to the v5.8.4 (latest stable version)
Thanks in advance!