Problem with WP Data Access Column Types

Here is a screenshot from this live website:

As you can see, for any item listed in the data table, you can click on the 'reveal' button and a music notation snippet appears, along with an audio sample that can be played. The equivalent page on the transferred site is:

And you can see that the Incipit and Excerpt columns are now only displaying media item numbers, not the actual media items themselves.

If I check the column settings for this table on the transfer site, I see this:

Note that 'incipit' and 'excerpt' are listed with a blank column type. So I set those to 'image' and 'audio' types respectively and click apply column settings:

As you see, it produces an application error, the column settings are not saved and I cannot therefore view the music or listen to it. Any help appreciated!