Unable to enter private QField Cloud instance / URL in latest QField Sync plugin version

[gis-kmg]

What is the bug or the crash? What were your expectations and what actually happened?

When using the latest QField Sync plugin and entering the URL of a private QField Cloud instance the login options are then greyed out.

Issue was not present in earlier plugin versions

Reverting to plugin from April resolves issue

Issue seen on multiple devices/users with latest plugin version
Private QFieldCloud instance operating as normal (URL resolvable for administration, QField Mobile app working)

Steps to reproduce the issue

Open QGIS desktop
Open QField Sync plugin
Click icon twice for custom URL
Enter URL of private instance
Username and password fields are greyed out
No sign in option is available for private instance (although instance operating as normal)
Changing URL to another default URL (e.g. https://app.qfield.cloud/) login is possible
Uninstalling plugin and installing older version resolved issue

QGIS version

3.44.8

QFieldSync Version

4.22.3

Operating system name

Windows

Operating system version

w11

Reinstall QFieldSync

• I have a fresh install of the latest QFieldSync version on a new QGIS profile, but the problem persists.
• Problem can be reliably reproduced, doesn't happen randomly.
• Problem happens with all files and projects, not only some files or projects.

Additional context

No response

[suricactus]

What version of QFC you use in your private version?

I guess it is related to QFS depending on https://app.qfield.cloud/swagger/#/api/api_v1_server_info_retrieve .

We didn't break this deliberately, so it would be nice to discover the exact QFieldSync version that it stopped working.