I have a 2018 model 28.
Today the door refused to open from the inside as I was trying to exit the trailer. I had a screwdriver and was able to take the faceplate off from the inside. This required removing the three screws which were hard to access behind the screen door. Once removed, I used my screwdriver to pry a lever to the right, (above my finger in photo), which releases the door latch.
Looking at the faceplate and the door latch mechanism, I see no reason for the failure.
I decided to replace the faceplate and see if it would fail again. However, I can not figure out what the notched plate on the back of the face plate, should engage with.
I am attaching a couple of photos for reference.