[Plugin: Zotpress] showimage="yes" results in error

Hi there,

I am loving the zotero plugin, although when using the showimage=”yes” option I have the following error. I have a dozen citations to list, only one of which has a thumbnail. Could this be a bug?

Fatal error: Call to a member function get_results() on a non-object in /home/<deleted for privacy>/wp-content/plugins/zotpress/zotpress.shortcode.php on line 386

Cheers

https://www.ads-software.com/extend/plugins/zotpress/