Add Account -> Scan QR Code does not work

[czchen]

Reprocedure Step

• Display a valid QR code on screen.
• Select Add Account.
• Select Scan QR Code.
• There is no response.

Expect Result

• The account shall be added.

Others

An account can only be added by file, after filesystem=home is granted.

[imrejonk]

I can reproduce this on Wayland. This error gets logged:
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: RpcResponse.error(status: invalid-command, message: Invalid parameters: Unable to capture screenshot, body: {})
This is the exact same error that gets logged by the native (non-flatpak) Yubico Authenticator when gnome-screenshot is not installed. Yubico Authenticator relies on gnome-screenshot for grabbing QR codes. This is documented in the README.adoc file.

To be clear: I have the gnome-screenshot RPM installed, but this flatpak still fails to scan QR codes on Wayland. I suspect that the flatpak needs to have gnome-screenshot installed inside the sandbox for QR code scanning to work.

There is also a flatpak portal for taking screenshots: https://docs.flatpak.org/en/latest/portal-api-reference.html#gdbus-org.freedesktop.portal.Screenshot

A workaround for now is to use an X11 session.