Please update for the newest WordPress version

Please please please I love you plugin so much. I saw today, that it slowed down my website, so I deinstalled it and reinstalled it. First it said, that it is not tested with the current version of WordPress. I installed nevertheless and it gave that error: Fatal error : Uncaught TypeError: array_merge(): Argument #1 must be of type array, bool given in /home/customer/www/aloebenessere.it/public_html/wp-content/plugins/sticky-side-buttons/sticky-side-buttons.php:44 Stack trace: #0 /home/customer/www/aloebenessere.it/public_html/wp-content/plugins/sticky-side-buttons/sticky-side-buttons.php(44): array_merge(false, Array) #1 /home/customer/www/aloebenessere.it/public_html/wp-includes/class-wp-hook.php(324): ssb_activate(”) #2 /home/customer/www/aloebenessere.it/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array) #3 /home/customer/www/aloebenessere.it/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /home/customer/www/aloebenessere.it/public_html/wp-admin/plugins.php(196): do_action(‘activate_sticky…’) #5 {main} thrown in /home/customer/www/aloebenessere.it/public_html/wp-content/plugins/sticky-side-buttons/sticky-side-buttons.php on line 44 Please please update it. Thanks