Oh.. So you made a change to the Timeline module a while back. Since I am not sure what you did, not sure how to tell you to resolve it unfortunately. If it was just a single file, sometimes you can replace that file with the default one. 

Judging by your screenshot form 2018, it looks like __item_content_raw__ is showing in the new Protean where you used to have an attachment. I assume "Morning Has Broken" is a sound file that was attached.