FCPX Sound effects have no items in it
I am using FCPX today and I tried to click the sound effects in search for some music and foley, but it appear no items, this is strange becoz I have used it two days ago and it is no problem. And I checked the Library ->Audio-> Audio Loops->Final Cut Pro Sound Effects Folder, It saw all the sound files is here , so is it any problem happened and how to fix it ? thx
MacBook Pro 15”, macOS 10.15