Cannot access Derelict Mansion

I've activated multiple of the hengestones in surrounding maps and couldn't access it (it wouldn't unlock) and now there are no more nearby maps. There is now an open path to the mansion and the aura around it is gone but putting in a 6 or 7 tier map will give me the error: "Activation Failed: Map is not accessible."

This could be fixed by removing the extra check. Normally, the map isn't selectable and becomes selectable once the requirements have been passed. Anyway, in my case the game thinks both the requirements have been done and that they haven't. I am able to select it but it won't open the map because of the extra check the game is performing. If you just assumed that the map is accessible if you are able to select the map without doing that last check I would be able to get in.

Then again I don't know if there is any way to glitch the selection to an unavailable map. Clearly this check is there to guard against this. That said, this is the beta: you should err to the side of letting players into maps.