KNR Author List has stopped loading list

Hi, I run a web site https://www.footyalmanac.com.au and on this site we usually display a list of all the authors (around 950 of them) on a page called The Almanackers – here is the URL which you can access the page I am talking about https://www.footyalmanac.com.au/the-almanackers/

We have had to remove the link to this page from the menu because the list simply does not load up.

I understand that the plugin is not recommended or tested beyond WordPress 3.3.2, however it was working up until recently on our WP 3.5.1 version.

Is there any limitation on this plugin working with too many authors? Is there a PHP limit we need to increase on the hosting server to accommodate this list to load?

I appreciate any assistance as quickly as possible.

thanks
James

https://www.ads-software.com/extend/plugins/knr-author-list-widget/