Try putting PC that runs dedicated server to a DMZ in your router settings. Typically you need to use LAN ip address of PC to do that.
You may need to install .net framework 4
You're looking for logs on a remote pc, not local, right?
Try to open http://localhost:8088/ in different browser - i.e. Chrome
Dedi log is in %localappdata%\Sector3_Studios_AB\logs
have you tried solution to Error message on start as described here?
As of this error code 5 stands for "Access is Denied". Try to launch dedi as administrator.
Separate names with a comma.