Photos not working in iMovie

After updating the app on June 2nd, I found it difficult to add clips from my photos library that are linked to iMovie onto the editing timeline. When I highlight a clip, a small task loading circle appears above the highlighted clip for a split second before disappearing. Then when dragging the clip into the timeline to add it to the video I'm working on, it just shows a still image of the first frame of the clip with zero audio for the duration of the clip or a black screen that says "Missing Media". Then if I do it enough it will show a little stop sign next to my cursor and won't let me add the clip at all. I have to drag it in multiple times or wait a few minutes in order for the clip to work as it should. Also if I use a clip that's already in another project I was working on before I updated the app and the clip doesn't work, there will be a "Missing File" screen where that clip should be even though it was already in use before. I have both iMovie and my photos library stored on an external hard drive. It's incredibly frustrating to have to take this much time to edit a video all of a sudden. It basically makes the program unusable at this point. Any help would be greatly, and I mean GREATLY, appreciated.