Undefined index: format and more…

The plug-in description page at https://www.ads-software.com/plugins/authors/ has installation instructions that say you can “optionally” adjust the settings. The installation steps does not list a final step of clicking “Save”.

This causes the ‘widget_authors’ option to be empty of certain settings, and therefore the server logs begins filling up with the follow errors:

Undefined index: format in /wp-content/plugins/authors/authors.php on line 316
Undefined index: order in /wp-content/plugins/authors/authors.php on line 317
Undefined index: limit in /wp-content/plugins/authors/authors.php on line 318
Undefined index: show_fullname in /wp-content/plugins/authors/authors.php on line 319
Undefined index: show_avatar in /wp-content/plugins/authors/authors.php on line 320
Undefined index: avatar_size in /wp-content/plugins/authors/authors.php on line 321
Undefined index: show_credit in /wp-content/plugins/authors/authors.php on line 327
Undefined index: show_credit in /wp-content/plugins/authors/authors.php on line 354