FIX for 'Registered IP : Not Set ’ seems when I request token for Alpha 2 it shows my ‘Registered IP : Not Set’. ‘Set IP’ is greyed out so I get ‘code error: could not connect to safe network’ error.
To set your IP and resolve the issue I found that selecting Testnet 19 first thru the invitation where the Set IP is in blue and does work, then unblocks same button on Testnet Alpha 2 letting you set your IP and authenticate without error.
FYI