PHP 7 : error 500 on login page

Hi,

First, thanks for your very good plugin.

It work on PHP 5.6, but I get error 500 on connexion page when I use PHP 7.

Is your plugin compatible with PHP 7?

If it is, I need your help. Else can you update your plugin to make it compatible ?

The page I need help with: [log in to see the link]