theme problem 4.7.4

hello, this module only seems to work with the default themes drupal comes with. When I switch over to a custom theme and then pick a language and hit change the browser screen goes white. The site will come back if i close and reopen the browser and go to my site. I've also tried downloading a theme off the drupal site and then trying it but it still does the same thing. Is there a way i can get this working with a custom theme? thanks.