Certain listening exercises do not play. (403: Access Denied)
This is in the Esperanto course, but I believe I've seen it in others as well.
Using Chrome console, I see that certain audio files for listening exercises are returning a 403: Access Denied error.
Here's one that works: https://d7mj4aqfscim2.cloudfront.net/tts/eo/sentence/72907a5b3a28700f40a9a446b1c4bd4e
Links to an mp3, no problem.
And here's one that doesn't:
In which case I get Access Denied.
What's going on here? Is this the fault of the language course designer? Is it Duolingo's fault? The exercises with these audio portions are unanswerable, and I have to end up copying and pasting the answer after skipping it several times. This needs to be addressed.
I never used Duolingo on the web before today, and I'm seeing this same error with "word bank" exercises throughout the Russian course; none of the audio bites play, and the console is full of 403 responses from AmazonS3.
Here's a sample of requested sound: https://s3.amazonaws.com/duolingo-data/tts/ru/token/книга
Interestingly the listening exercises work fine.
I am getting HTTP response code 403 Access Denied too for the second hyperlink you have posted. I suspect that it is either a problem with the web host or the web script.