Blog templates plugin has stopped working after update

Hi, I updated the plugin today and I went to create a site from the dashboard and after clicking add site a blank white screen came up so I refreshed the page and it said the site had already been created. I then went to the url and the site was there but the selected template was not implemented. I also tested this by signing up using wp_signup.php and the site is created once again without implementing the template selected.

Thanks for any help