CSV Import Fails

Howdy, folks.

I’m starting with a fresh install of WP/WC and have exported my products from the original site. The CSV downloads properly from the source, all 38 items appear in the file, but when importing to the target site, the ‘spinny’ thing appears and hangs for some time. I’ve waited upwards of 20 minutes, which seems ample for the small number of items in my store. When I cancel out, only one item (the first in my shop) appears.

Have any of you seen this before? Is there a fix?

Thanks in advance!