This a fairly common issue with early experiencers; it was for me as well when I reintroduced myself to the practice after a long layoff in my late twenties/early thirties.
There can be various reasons, one of which Nameless explained, and that has to do with Intent. Your understanding of the concept of Intent and how it is crucial to making progress with AP is something that will need to develop and evolve over time. Each time you make a "projection" attempt or go to sleep with the idea of having a LD/AP, you need to start by forming a coherent and concise message of Intent that you express/communicate to your subconscious/inner self/whatever. This is also an express communication to whatever outside "guidance" may be available to you.
The simplest example of this is telling yourself every night to remember your dreams.
Another and possibly more common reason for NPR blindness is overcome simply with a few more experiences and the problem seems to solve itself. Your ability to "see" in the NPR is a new skill and an ability that has to develop over time. Keep in mind that you are not using your physical eyes. But since that is your only frame of reference up to this point, you haven't yet figured out how or what NPR sense you need to activate. You are actually using a new part of your mind, maybe the part that makes you think you are "seeing" when you dream...
These new, undeveloped NPR senses also relate to how you move, how you feel objects, whether you can smell or taste or hear or talk...those are all Physical Reality concepts. Your new NPR senses will gradually develop and get you the information but initially your PR-based mind is going to twist itself into various pretzel shapes as you try to convert this information into something that feels like it is coming through the usual PR-based 5 senses.
The real fun begins when you start opening up to the new NPR sensory concepts available to you, like 360 degree vision or simultaneous multiple perspective...
So "clarity now!" or "vision now!" shows good situational awareness actually and works for some (it didn't for me either the first two times

) or a modification of your pre-induction mission statement (your Intent) as Nameless suggested, may help. Either way, I think with a few more successful exits you will find things should "clear up" for you.
