PPTP VPN Server - Can connect, but that's it

I created a VPN server in Windows 8.1 via ncpa.cpl (originally via this article). I was able to connect my iPhone and its LTE connection to the VPN (home desktop), and it also has a proper IP address (given the info in VPN properties > Networking > IPv4 Properties). I can even ping the phone with Command Prompt.

What isn't working on the phone is any type of Internet connection. The VPN server is already setup to allow sharing of the Internet connection, which doesn't seem to be working. Because of this (I'm assuming), I can't access the computer's files via SMB like I usually can when connected via the same local network on Wi-Fi, after trying both IP addresses (LAN IP + VPN IP).

Any ideas? I've done some reason, but haven't found anything useful. I've checked out the various properties and settings without success.

Bump? I can still connect, get a proper, pingable IP address, but that's still it. Can't access local data or Internet.

I have the exact same issue like you, and i cant seem to fix it, i did unfortunatly make a new post before i saw this thread though :/ But i hope that this issue gets fixed soon, or we get help some time.