Hello, were you able to resolve this error message? I am currently running into same issue.

I am also facing same issue.

Are you able to import the bot without the packages included? 

I am also receiving this same error message while trying to export a bot that has no dependencies.  This error message is received when packages and included and when they are not included in the export; this does not seem to be a factor (looking at the response from @Micah.Smith).  After looking at my code, I noticed that some of the recorder capture actions are missing the image preview.  I had copied the code from an existing bot.  I believe the issue with the missing preview images may have been introduced with the .28 release.  If you are able to recapture your images, it may be fine for you.

we are facing this issue after we upgraded to v28, any resolution?

Good afternoon, is there any solution for this problem?

I am experiencing the same problem, the previews of the recorder image were erased.