Last update crashed my site!

I fixed the error on the website by disabling the plugin, but would like to use it in the future. Is anyone else having trouble with the last update (02/13/2018)?

Can you give your server PHP version?
https://stackoverflow.com/questions/1075534/cant-use-method-return-value-in-write-context

Change line 829 and 830 with

else
            {
                $gr_user_max_discount  = WC()->session->get('gr_user_max_discount');
                WC()->session->set( 'gr_user_applied_discount', ( ! empty( $gr_user_max_discount  ) ? $gr_user_max_discount  : 0 ) );
            }

PHP V 5.4.29
I’ve been dreading the update to PHP, for fear of throwing bugs into other plugins.

ok, understand. Please update the code via Plugin editor, and let me know the status. It should work