I am unable to log in via web interface despite providing correct credentials.
When looking at the browser console output, I see this warning message:
The current version of Syncrify does not accept passwords in foreign characters. You can only use English letters, numbers and special characters.
These are not foreign characters. These are latin letters, numbers and special characters. However, since Syncrify is a multi-platform (not just Windows) application, going away from the "" encoding to something a bit more universal would be a good idea, IMO.