Unable to display a local page when using "Private page with TOR"

I have a list of websites on a local HTML page, but when opening a “New window with TOR”, it refuses to display that local page, claiming it is blocked by an extension, and to try turning them off. Brand new installation, only default extensions - turned them all off - no difference. :frowning:

Is it trying to access my local page through the TOR network, rather than going directly to the disc file? If so, can that be remedied in a future release please?