Photo auto-upload to external storage fails

[meichthys]

Steps to reproduce

1. Add external storage to nextcloud (I'm using WebDAV)
2. Enable auto-upload on iOS app to external storage directory
3. Take pictures and watch 'Transfers' screen to see errors

Expected behaviour

Photos should upload and clear out of Transfers screen

Actual behaviour

Photos do seem to upload, but the photo remains in the Transfers screen with error: `

Screenshots

If applicable, add a screenshot showing the issue.

Logs

Liquid for iOS 4.1.0.17 © 2021
2021-12-19 14:42:29 Network completed upload file: https://domain.mydomain.org/remote.php/dav/files/username/Photos/21-12-19 14-41-31 7815.jpg with error code 503 and error description 503: The server is temporarily unavailable

Reasoning or why should it be changed/implemented?

Environment data

iOS version: e.g. iOS 15.1.1

Nextcloud iOS app version: see More > Settings

4.1.0.17

Server operating system:
Ubuntu (nextcloud VM)

Web server:
Apache

Nextcloud version: see Nextcloud admin page
22.2.3

[meichthys]

And just for reference, the WebDAV server is up and running. I can upload files to it fine using the nextcloud web interface.

[chrissi5120]

#1788

[meichthys]

Closing in favor of #1788