Warning: Illegal string offset ‘id’ in wp-tabs-slides.php on line 510

I’m not sure if this is related to a conflict to another plugin, as other aren’t reporting the issue, though the error being reported here seems odd.

Warning: Illegal string offset ‘id’ in /home/WEBSITE/public_html/wp-content/plugins/wordpress-tabs-slides/wp-tabs-slides.php on line 510

I’ve commented the line out for the time being:
//$id = $attr[‘id’];

This doesn’t really make sense, because the syntax looks correct. We were initially trying to use the “id” notation because otherwise the tabs are displayed with “tab-01”, “tab-02”, etc., but haven’t found a way to make the ID work. The error being displayed is new, and probably happened after the Jan 13 update.