Wordpress plugin revslider issue to update the PHP Version

Hello my site run on the PHP version 5.6 but when i have update the PHP version 7.0 the site is not working it will be showing white page only.

I have enable debug log and check that revslider plugin not working in the PHP version 7.0 . I have update the plugin.
But site is not work. I have already enable the debug but it will be not showing any error.
Please tell me now what can i do next step.