For my blog porgografie.wordpress.com (free account), customizer doesn't seem to be working, since when I click "Customize", it only says "Loading design tools…" on a black bar on the right side of the screen (the rest of it is white and empty). This has been going on for about a week now, although I had been able to open the customizer previously without any problems occurring. The theme I am using is Silesia. I have tried changing it too, as to see whether that problem is due to the theme chosen, but the live preview isn't working either for any of the other themes I have tried.
I am using Google Chrome Version 24.0.1312.57 m on a 64 bit Samsung Vaio laptop with Windows 7 Home Premium.
Everything but the customizer and live preview seems to be working just fine.
Thank you for your answer.
The blog I need help with is porgografie.wordpress.com.