After php update no Widget showing

Hi!
First: I use this cool Plugin for a while.
But now my hoster make an php version update from 5.3 to 5.5.18

Since this update the Widget is gone. I cant put it into my sidebar like before.

Do you habe a idea?
I try to make a shortcode with:
<?php if (function_exists(‘relevanssi_the_excerpt’)) { relevanssi_the_excerpt(); }; ?>

But this dont work too.

https://www.ads-software.com/plugins/relevanssi/