Use Tor's built-in HTTP proxy instead of polipo. Remove Polipo from Orbot. Comment from other cypherpunks: current Orbot version does, but in about orbot popup it still reads polipo! but httptunnelport is bound
Tor alpha now include HTTP proxy by default. You should use it instead of polipo.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information