ErrorDomain error -1.)

Hi, Gmanstrikes,

The Compressor Kit Error message has been reported with increasing frequency

of late. No universal fix so far, although lately users with the problem have

been able to fix it by reinstalling/updating/upgrading iMovie and, if

necessary, the operating system.  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.

Here’s a link to a thread where one poster solved the problem by removing a

64bit marker from an iTunes update. 

Another poster tried the solution and it worked for that poster as

well.  It seems that updating iTunes may

cause iMovie to exhibit the CompressorKit:Error.

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

Here's a 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.

-- Rich