I had a similar issue. Something had a reference to an object that had been moved. To fix the issue I took the following steps:
- Move the object (or I suppose an object with a similar name) to the expected location (as mentioned in the log)
- “Fix Up Redirectors in Folder” (I perform this on the root folder, by right clicking on it, and choosing the option).
- Move the object back to the original location (or I suppose, deleting it again)
- “Fix Up Redirectors in Folder”
My guess is something went wrong during the move/delete, and some of the assets didn’t get updated.