I have the same problem, but interesting though, is that the subnet's weekly/monthly/yearly html are created.. try to open a daily subnet and then change the number '1' in the url, by a '2'... example:

Change:
http://192.168.0.1/Subnet-1-192.168.0.0.html
To this:
http://192.168.0.1/Subnet-2-192.168.0.0.html