Final Cut Pro: iMovie library export error

Using Final Cut Pro 11.2 on 2019 Macbook Pro w/64GB Memory, 2.4 GHz 8-Core Intel Core i9, AMD Radeon Pro 5600M 8 GB and Intel UHD Graphics 630 1536 MB. 8TB HD.

Tried exporting imovie library to FCP, but process did not complete- I received the error message shown in this screenshot. Any suggestions? Thanks.