# YouTube Video and Audio Downloader (WebEx) download panel with undefinedK error

**URL:** <https://discourse.mozilla.org/t/youtube-video-and-audio-downloader-webex-download-panel-with-undefinedk-error/59713>\
**Category:** Add-on Support\
**Created:** [May 10, 2020, 4:41pm UTC](https://discourse.mozilla.org/t/youtube-video-and-audio-downloader-webex-download-panel-with-undefinedk-error/59713 "2020-05-10T16:41:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mrbetelman](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@mrbetelman](https://discourse.mozilla.org/u/mrbetelman)\
**Post date:** [May 10, 2020, 4:41pm UTC](https://discourse.mozilla.org/t/youtube-video-and-audio-downloader-webex-download-panel-with-undefinedk-error/59713/1 "2020-05-10T16:41:46Z")

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This add on has worked for years without issue and I’ve loved it. Today I opened it and the download panel has the download icon followed by the file size (tiny, medium, large) and the word UndefinedK  
What does that mean and how do I fix the issue?  
Thanks in advance

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**Author:** ![Joe\_White](https://avatars.discourse-cdn.com/v4/letter/j/f1d935/32.png) [@Joe\_White](https://discourse.mozilla.org/u/Joe_White)\
**Post date:** [June 21, 2021, 2:00pm UTC](https://discourse.mozilla.org/t/youtube-video-and-audio-downloader-webex-download-panel-with-undefinedk-error/59713/2 "2021-06-21T14:00:07Z")

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I also had this problem a few days ago. So I searched for a fix and I managed to find this thread, but without an answer. Later I found a workaround on my own. Even if it’s a very old thread, I still want to give an answer to also help people who have encountered this issue.  
**Try right click \> this box (or similar) \> open box in a new tab**  
This worked for me.  
Bye