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Seeing the following error with PHP 7.2+ …
Warning: count(): Parameter must be an array or an object that implements Countable in /xxx/xxx/xxx/xxx/wp-content/plugins/sticky-side-buttons/ssb-main.php on line 217
Something like this should fix it…
if ( is_array($buttons) || is_object($buttons) ) $btns_count = count($buttons['btns']);