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  5. Lessons do not complete


Lessons do not complete

After answering the last question of a lesson and pressing on "Continue" nothing happens. I see the loading indicator turning but the lesson summary won't show. After a while the home page opens where I can see, that i didn't get any points. I tried this with different browsers and different lessons.

June 28, 2013



Look like the PUT request at the end fails:

PUT http://www.duolingo.com/sessions/... HTTP/1.1 Host: www.duolingo.com User-Agent: Mozilla/5.0 (Windows NT 6.2; rv:22.0) Gecko/20100101 Firefox/22.0 Accept: application/json, text/javascript, /; q=0.01 Accept-Language: de-de,de;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate Content-Type: application/json; charset=UTF-8 X-Requested-With: XMLHttpRequest Referer: http://www.duolingo.com/ Content-Length: 16033 Cookie: ... Connection: keep-alive


I've been having this problem as well, on multiple computers on multiple networks, not sure how to fix it; I'm not using a proxy.


I found the problem: Hotspot Shied Elite seems use a local proxy at that causes the problem. When deactivating this proxy everthing works fine again.

  • 2460

It sounds like the proxy is misbehaving. We changed the PUT URL to be unique per session, but even with this change your proxy is interfering. Thanks for letting us know about your proxy and that it caused a problem for you!


I am also having this problem, but only about 50% of the time. I have tried different computers and browsers, and I don't use a proxy.

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