https://bugs.winehq.org/show_bug.cgi?id=36423
--- Comment #17 from Someone scrimekiler@yahoo.fr --- Are you talking about the ingame shop or the launcher menu store ?
I was talking about the store menu where you can buy runes, champions and other things, you too ?
I had this problem and I solved patching the game, following the instructions from this page: https://bitbucket.org/Xargoth/tuxlol/wiki/Home
I hope can help to you, too.