Unable to login desktop sync application

[Arcau]

Expected behaviour

Tell us what should happen

Login to the server with the desktop application

Actual behaviour

Tell us what happens instead

Receive Invalid credential message

Steps to reproduce

1. Open OwnCloud Desktop App
2. Input server address
3. Attempt to login

Server configuration

Operating system:
Unraid - Docker image

Client configuration

Client version:

Operating system:
Fedora Linux 40
OS language:
ENG
Qt version used by client package (Linux only, see also Settings dialog):
6.4.3
Client package (From ownCloud or distro) (Linux only):
owncloud - 5.3.1.14018 f15fd5
Installation path of client:
/usr/share/applications

Server
pastebin - /unMmhBjj
Client
pastebin - /snagMMyd

I had tried with OTP turned on and off - then attempted to use OAUTH with no luck (OAUTH gave a 403 forbidden page)
Application also seems to be locking up when attempting to paste in password.

Webgui works fine and am able to login to web on same machine / network etc.
Unsure what is happening here.

[cortez]

Using a Mac on the latest OS Monterey, I also cannot log into the Owncloud desktop sync client.
If I click on the “open browser” button or copy the link and paste it into my browser, I get this 403 Forbidden page:

Nothing else.

I can log in on the iOS Owncloud app and also in the browser site without problems - it’s just not working on the desktop sync client (which ironically goes through the same browser I’m already logged in).
I used Firefox, Chrome and Safari to try to get the Desktop app logged in.

I also tried downgrading to the previous version of the Desktop sync app, but the problem was the same.