To correct the code, I changed the lines @ line 147:

Original –
$title = empty($instance['title']) ? ' ' : apply_filters('widget_title', $instance['title']);

Modified –
$title = empty($instance['title']) ? <strong>''</strong> : apply_filters('widget_title', $instance['title']);

https://www.ads-software.com/extend/plugins/simple-adsense-inserter/

I have seemingly successfully added the Simple Adsense Inserter plugin to my site and entered the publisher id number from Google. As I have never had Adsense prior to this do I still need to put in a new Ad Unit or do I just wait now for something to happen.
I can see the place on my sidebar where the inserter is so I assume it is fine.
my site is https://www.newcastlepetphotos.com

Thank you

https://www.ads-software.com/extend/plugins/simple-adsense-inserter/