Hey, thank you for your reply. The selected region, is Europe. Strange, but after restarting the computer several times and clearing the browser's cookies, changing the language in the browser's settings to English was enough for SAS Studio to finally work in English. Strange.
So I think the following steps may help other people: 1) change the language in the browser; 2) clear cookies and close all windows along with the browser; 3) restart the computer.