In their latest update to version 0.21.0 they added QT-6 Support.
This breaks the theme and makes it unusable sadly.
Output of sddm when running the greeter with the theme
High-DPI autoscaling not Enabled
Reading from "/usr/share/wayland-sessions/hyprland.desktop"
Reading from "/usr/share/wayland-sessions/sway-nvidia.desktop"
Reading from "/usr/share/wayland-sessions/sway.desktop"
Reading from "/usr/share/xsessions/i3-with-shmlog.desktop"
Reading from "/usr/share/xsessions/i3.desktop"
Loading theme configuration from "/usr/share/sddm/themes/aerial/theme.conf"
Socket error: "QLocalSocket::connectToServer: Invalid name"
Loading file:///usr/share/sddm/themes/aerial/Main.qml...
file:///usr/share/sddm/themes/aerial/Main.qml:63:19: Playlist is not a type
playlist: Playlist {
^
file:///usr/share/sddm/themes/aerial/Main.qml:63:19: Playlist is not a type
playlist: Playlist {
^
Fallback to embedded theme
file:///usr/lib/qt6/qml/SddmComponents/LayoutBox.qml:35:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo() { ... }
file:///usr/lib/qt6/qml/SddmComponents/ComboBox.qml:105:9: QML Image: Cannot open: file:///usr/lib/qt6/qml/SddmComponents/angle-down.png
file:///usr/lib/qt6/qml/SddmComponents/ComboBox.qml:105:9: QML Image: Cannot open: file:///usr/lib/qt6/qml/SddmComponents/angle-down.png
qrc:/theme/Main.qml:41:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo() { ... }
Adding view for "DP-0" QRect(0,1440 5120x1440)
Loading file:///usr/share/sddm/themes/aerial/Main.qml...
file:///usr/share/sddm/themes/aerial/Main.qml:63:19: Playlist is not a type
playlist: Playlist {
^
file:///usr/share/sddm/themes/aerial/Main.qml:63:19: Playlist is not a type
playlist: Playlist {
^
Fallback to embedded theme
file:///usr/lib/qt6/qml/SddmComponents/LayoutBox.qml:35:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo() { ... }
file:///usr/lib/qt6/qml/SddmComponents/ComboBox.qml:105:9: QML Image: Cannot open: file:///usr/lib/qt6/qml/SddmComponents/angle-down.png
file:///usr/lib/qt6/qml/SddmComponents/ComboBox.qml:105:9: QML Image: Cannot open: file:///usr/lib/qt6/qml/SddmComponents/angle-down.png
qrc:/theme/Main.qml:41:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo() { ... }
Adding view for "DP-2" QRect(840,0 3440x1440)
qt.qml.context: file:///usr/lib/qt6/qml/SddmComponents/PictureBox.qml:106:13 Parameter "event" is not declared. Injection of parameters into signal handlers is deprecated. Use JavaScript functions with formal parameters instead.
qt.qml.context: file:///usr/lib/qt6/qml/SddmComponents/PictureBox.qml:106:13 Parameter "event" is not declared. Injection of parameters into signal handlers is deprecated. Use JavaScript functions with formal parameters instead.
In their latest update to version 0.21.0 they added QT-6 Support. This breaks the theme and makes it unusable sadly.
Output of sddm when running the greeter with the theme