[UI/UX] App stuck at startup, when a wrong uri is entered at account creation ("unsupported URL")

Expected behaviour

1. Tap Nextcloud Icon to start app
2. Get notification, that an errorneous URL has been used to create a new account
3. Get possibility to change mistake

Actual behaviour

1. Tap Nextcloud Icon to start app
2. Get notification ("unsupported URL"), that an errorneous URL has been used to create a new account
3. Mysterious White Loading screen shows up, no buttons whatsoever, no information of how to proceed
4. App is stuck. no possibility to advance or correct mistake (see screenshot)

might be related to

https://github.com/nextcloud/ios/issues/47

Steps to reproduce

1. create 2 accounts that work (i have my private nextcloud and my work owncloud account)
2. try to create a third account and insert an invald/incomplete/seemingly valid url, that still does not work e.g "blubber.dfr" without protocol (https and http)
3. restart app

iOS version

13.3

App version

can't say (everything up to date at 28.1.2019)

Server configuration

Operating system:

Web server:

Database:

PHP version:

Nextcloud version: (see Nextcloud admin page)

Start by reproducing the invalid or incomplete URL flow during third-account creation on iOS, then follow the startup and account-creation entry points involved after the “unsupported URL” notification. Confirm that the app offers a way to correct the URL or continue instead of showing an empty loading screen, and retest after restarting the app.