Are you sure this isn't just a case of the housing server being simply overloaded? As I've had that same thing happen to me in the past on Balmung during peak times on numerous occassions - often the only way to get inside was either to keep trying the door target every few seconds and eventually it would let me in without the error, or I just teleported somewhere else and waited a while before trying again. It was simply caused by too many connections to the housing server (which are used for the housing interior).

Sadly there isn't really any quick fix to it I'm afraid.