My name is ***** ***** certified computer professional with over 10 years experience.
I will be glad to assist you with this.
I am sorry to hear that you are having this issue.
I can check on this for you with a screen connect session.
try this please> choose iTunes > Preferences, click Advanced, and click Reset.
check to see if the iTunes library is visible in iMovie.
okay, try this next>
Choose File > Library > Organize Library.
Select “Consolidate files.”
Files remain in their original locations, and copies are placed in the iTunes folder.
Then select “Reorganize files in the folder ‘iTunes Media.’”
okay, try this next please>Open Disk Utility, select your hard drive or SSD and select Repair Permissions.
Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
Open your finder ( magnifying glass ) type in disk utility, and launch the disk utility application.On the left side of the disk utility window, click your mac hd, then at the lower right hand side, click repair permissions .
When this completes, go in and delete your com.apple.imovie.plist file.
Once you have deleted the file, restart your Mac and test.
I will try to do everything i can to help you get through this process.
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I completely understand. Here is the refund link to assist you.