Can no longer open Passwords in iPadOS 18

My wife had this same problem, iPad Air 5th Gen, on 30th Dec 2024

Chuck’s fix worked.

Tap on the password app,

• it opens but the screen is blank
• at the very top of the blank screen, in the centre, are 3 tiny dots, close together (about 5mm wide in total)
• tap on those dots
• a short menu pops down (options are “full screen”, “split view”, “slide over” and “close”)
• ignore that menu :-) and instead look down to the bottom of the screen,
• there should be two rectangles at the bottom edge of the screen
• the first rectange is grey and empty, and says “passwords” under it
• the second rectange has a big + sign in it, and says “new window” underneath
• tap the rectange with the + sign
• a new window opens in the screen, replacing the previously empty one, it should show your passwords
• as you cry out in joy and relief, and offer silent (or vocal) thanks to Chuck, before you finish, notice that there are now 3 rectangles at the bottom of the screen…
• the first is still the empty grey one, the second is a tiny replica of your new (working) password screen, and the third is a big plus sign
• flick the first (grey) one upwards to close it (it was useless anyway after all)
• now just tap anywhere in the main screen to make it the “current” screen
• you’re all done.