error export swivel

This happens when I include the camera from "Adobe Animate" in the animation and try to export it. When I use Swivel, it shows an error. However, when I remove the camera, it exports normally in Swivel. Any solutions?

SWIVEL ERROR:

Whoa! Something bad happened, and the program blew up. Sorry about that!
Please copy and paste this junk and send it to mike@newgrounds.com along with the SWF you were converting:

Invalid SWF
Method(format.swf.Reader,readPlaceObject)
Method(format.swf.Reader,readTagData)
Method(com.newgrounds.swivel.swf.SwivelSwfReader,readTagData)
Method(format.swf.Reader,readTag)
Method(format.swf.Reader,readTagList)
Method(com.newgrounds.swivel.swf.SwivelSwf,parseSwf)
Method(com.newgrounds.swivel.SwivelController,runTask)
Method(com.newgrounds.swivel.SwivelController,runTaskDelay)