There has been an error with your export

Hi friends,

On my edx server I am trying to export a course , then I got those errors :

There has been an error with your export.

Your course could not be exported to XML. There is not enough information to identify the failed component. Inspect your course to identify any problematic components and try again. The raw error message is: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters

On the cms log file I get this logs :

Jan 22 09:21:20 server90 [service_variant=cms][xmodule.video_module.video_handlers][env:sandbox] ERROR [server90 30139] [] - [Translation Dispatch] block-v1:1+2+12c+type@video+block@09a6ede737a7411a80f52dc444847860
Traceback (most recent call last):
File “/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/video_module/”, line 332, in transcript
File “/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/video_module/”, line 1018, in get_transcript
File “/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/video_module/”, line 64, in wrapper
return func(*args, **kwds)
File “/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/video_module/”, line 971, in get_transcript_from_contentstore
NotFoundError: No transcript for en language

What can be the problem on my site?

@Shukurlu, It seems like there is some video in your course without a transcript set.
Have you checked to see that all videos in your course have a transcript?
Do you have transcripts for languages other than English?

We’ve had this issue when there has been a change of storage location, so a transcript was uploaded and stored in one S3 bucket, but then when it came time to export the bucket was no longer available.