I have a small network with a couple computers and a mobile phone (android). The mobile phone can connect to the network through PPTP, but I can't see the computers through the file manager.
I believe the problem might be related to the fact that I can't join the network with the mobile client on: NETWORKS - CLIENTS - MOBILE
There's a tab "Join network" where I have to put the Network ID and the password, along with a button Join. I'm placing the network ID - something like 123-456-789 - and the password, and I always get the "Join error" message. I also tried leaving the dots on the password, some folks say it's automatically saved there.