Error "Sequencer defunct" when using video file related functions

Close Lightroom and update to version 6.3

Navigate to:

• Windows: C:\Program Files\Adobe\Adobe Lightroom\ 
• Macintosh: /Applications/Adobe Lightroom/Adobe Lightroom.app/Contents/Frameworks/

NOTE: To view the Contents folder, right-click the Adbe Lightroom application file and choose "Show Package Contents."

Rename the video toolkit file

• Windows: "video_toolkit.dll" to "video_toolkit.dll.original"
• Macintosh: "video_toolkit.agtoolkit" to "video_toolkit.agtoolkit.original"
  

Download the new video toolkit file

Unzip the video toolkit file and copy it to the same folder from Step 2.

Launch Lightroom