Russian lessons

I am trying to open a Russian lesson and the site does not let me open Russian lessons. The page does not load at all. When I tried the german site, it did open the lessons, but an error notification kept coming up.

Try to press F5 to refresh the site and try again to open lessons or at least the page of Russian library to search the lessons there via a searching box.
If it is about my lerssons, write here what course you are speaking and I give you here a link.
But today I also had some dificulties with opening my French and Italian lessons.

There was an issue with opening lessons on our side. Sorry about that! It should be fixed now. Let us know if you still run into this issue.