What happened?

Today when I opened the practice section to practice and strengthen my French courses but when I answered a question wrongly the window locked and did not proceed, why?

Please help...

November 29, 2016


I haven't seen this before. Here's the image, in the hope that someone can tell us what's going on:

November 29, 2016

The window locked? I would assume that that is just a problem with your browser.

November 29, 2016
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