Millions. Did you double- and triple-check your IP address? Are you even on the same network? That is quite common in the corporate environment, employees' mobile devices are on different networks.

Did you disable and re-enable developer mode in the meantime? It shoul not happen but it has happened to me at least once: disabling and re-enabling dev mode reset the password and I had to set it again. Though in such a case I would expect a different error than 'network timeout'.