Sorry to hear this, the plugin was tested on WordPress 4.8 and it works as expected.
My best guess is that there is a conflict with one of your other plugins and this causes the website to crash. If you could take a look at your server error log and share it here, I’d be more than happy to help you solve this.
If you would like to allow us to investigate this, please contact us and we’ll do our best to help you solve this.
Thank you, please let me know.