This seems to be an uncommon problem but I had this problem an I am so glad it is fixed. When I tried to build an ISPW in the bottom left it said "cannot access internet" than I could not add sources or apps. For me it was just a firewall problem, on of my firewalls (i have AVG and Macaffe im not sure which one) was blacking it from connecting. You can either log into your firewall and allow, or you can disable your firewalls while you are using winpwn. Like i said I have only heard of a few other people with this problem but i hope it helps people.