SUMMARY
On a freshly installed openSUSE Leap 16 machine I intend to use lightdm as default display-manager and lightdm-kde-greeter as the default greeter. Enabling the kde-greeter works, but it fails to connect to a WIFI because the lightdm-kde-greeter-wifikeeper service file contains the wrong path for the ExecStart command:

ExecStart=/lightdm-kde-greeter-wifikeeper

Since the actual binary is in /usr/bin/lightdm-kde-greeter-wifikeeper, it's a reasonable error message.

For some reason it seems like this variable @LIBEXEC_INSTALL_DIR@ isn't properly set (https://github.com/KDE/lightdm-kde-greeter/blob/7db46015c558ac6b85849b71fe62621b756e8e39/greeter/lightdm-kde-greeter-wifikeeper.service.in#L6)

As a workaround, I can set the correct path in the service file (/usr/lib/systemd/user/ligthdm-kde-greeter-wifikeeper.service) and then I can successfully connect to a WIFI within the greeter before the actual user login.

STEPS TO REPRODUCE
1. Install lightdm and lightdm-kde-greeter, configure it as default.
2. Before logging in, try to connect to a WIFI.
3. WIFI is not connected.

OBSERVED RESULT
Despite providing correct password, a WIFI connection is not established.

EXPECTED RESULT
Connecting to a WIFI in the greeter screen should succeed.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Leap 16
KDE Plasma Version: 6.4.2
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1