https://bugs.winehq.org/show_bug.cgi?id=36423
--- Comment #11 from Someone scrimekiler@yahoo.fr --- This is very strange : a friend with same wine version, same OS version (gentoo) doesn't have that shop problem.
I Checked his winecfg and winetricks and I found out he had less components/DLL overrides.
I created a new wineprefix with the same components than him installed with winetricks, the shop still doesn't display (still black background with nothing else)
Then I copied his wineprefix in my computer and used it with winecfg and then League of Legends.
And now the shop works...
I can't identify what cause that shop problem...