[Plugin: NextGEN Gallery] Gallery Columns disappeared after site migration

Did a site migration and on the new site my galleries are all appearing in a single column rather than 3 or 4 across as they did before. As far as I can tell, all my settings are the same.

I’ve tried reinstalling Nextgen, but that didn’t work. The phrase <?php wp_head(); ?> appears in my header, which was the only other possibility I’ve found.

I can’t for the life of me think what migrating would do to it, although all the nextgen settings did have to be reset.

Original site: https://www.closed-circle.net/WhereItsAt/ebook-catalog/

Migrated site with problem: https://www.closed-circle.net/ebook-catalog/

Any thoughts much appreciated.

https://www.ads-software.com/extend/plugins/nextgen-gallery/