unable to share project

The CompressionKit:Error is pesky. It has been reported with increasing frequency

of late. As you see from the info below, it likely is caused by an update to iTunes that

implants a 64bit architecture in the library.

However, some users with the problem have been able to fix it by

reinstalling/updating/upgrading iMovie and, if necessary, the operating system

to Catalina.  Also sometimes successful is starting up in Safe Mode (see

Finder menu for instructions) and then after everything loads immediately

shutting down and rebooting in normal mode.

Recently there has been a breakthrough on this issue, discovered by

nicocaro, who posted a solution on this forum. Below is a link to the thread where

he describes how to solve the problem by removing a 64bit codec from an iTunes

update.  Other posters have successfully tried the solution. It seems that

updating iTunes may cause iMovie to exhibit the CompressorKit:Error by

implanting a 64bit architecture in the system library, that conflicts with an

older version of iMovie. That would explain why upgrading to 64bit Catalina and

current version of iMovie has solved it for some posters here. 

Upgrading to Catalina, however, would disable all older 32bit applications

that would be no longer supported. Some legacy media may not play in iMovie,

either, and would need to be converted.

Here's the link to nicocaro's solution:

https://discussions.apple.com/thread/251266351

And here as well:

https://discussions.apple.com/thread/251352619

Here's another link, though older, that describes what others have tried

with the Compressor Kit Error:

https://discussions.apple.com/thread/8265338

There may be some proposed solutions in the above link that will work for

you.

All else failing, try calling Apple Support. The techs there are very savvy

and also have the capability of remotely accessing your computer. Click on the

Contact Support item in the upper right hand corner of this screen and navigate

to a place where you can provide your telephone number so that Apple Support

can call you back. I think that the file path is Contact Support/Mac

OS/Applications/iMovie.

Good luck with this.

If you have time, post back with your results, as it may assist others who

have this perplexing issue, and will contribute to our data base.

-- Rich

Hi, Nixon77,

Sometimes export problems can be caused by a corrupt preference.

Try deleting preferences. To do that, open iMovie while holding down the Option and Command keys and select to delete preferences in the box that appears. iMovie will open in a new library. Reopen your old library to get back to your projects. Now see if you can export your iMovie project to a video file.

-- Rich

What did you try?

-- Rich