Failed to configure

[prhbrt]

After installing (using qmake, make and make install into /usr, like stated in README.md) I had to copy tg-server.pub to /usr/bin for sigram to start without a segmentation fault:

sudo cp sigram/build/build/tg-server.pub /usr/bin/

However, I am not able to configure Sigram. The tray icon appears, and I can open the window as shown in the screenshow. However, when I select "configure" from the tray menu, nothing happens other than that the same empty window is shown

I am using Mint linux with cinnamon as desktop manager:

herbert@machine ~ $ uname -a
Linux machine 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
herbert@machine ~ $

The output of Sigram in the console is:

herbert@machine ~ $ Sigram
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///CountryImage.qml:37:5: QML Image: Cannot open: file:///usr/bin/countries/flags/.png
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
qrc:///Button.qml:61:25: Unable to assign QSizeF to QSize
QWaitCondition: cv destroy failure: Device or resource busy
QWaitCondition: mutex destroy failure: Device or resource busy
herbert@machine ~ $

Clicking "configure" in the tray icon adds no new output to the console.

[prhbrt]

PS: the same goes for "about", "about sialan", "donate" and "license".