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That means that a small part (at one end) of the Navajo loop trail is closed.
See the park map (pdf link). The map at the right hand side (Bryce Ampitheatre enlarged) gives you the relevant information. Wall street is shown highlighted in orange, which is marked as "summer use only". The rest of the trail is still open, so you could start at Sunrise Point, go down the Queen's Garden Trail, and then turn right at the crossroads to go up the Two Bridges part of the Navajo Loop, to Sunset Point.