Unable to log in to the Passwords app on iPhone

Even though there is a thread for this topic already I want to adress this again, because the solution here is not working for me. When I try to login into the passwords app by Johannes Schliephake, I get the message: “The encryption app is activated, but the keys have not been initialized. Please log out and log back in.” Which I tried. I also have the similar issue with the “Nextcloud Notes” app. From my point of view, it seems as though the login details are not being passed on to the app. Does anyone have a solution for this issue? Best, David