I’m thinking this may be a PHP version issue, but I found a fix too. I didn’t get the error on my localhost with PHP 5.3.1 but did get this on BlueHost with PHP 5.4.
Based on this thread about a similar issue, I merged the first two comments in the widget-title-links.php
file.
i.e. This:
...
Author URI: https://github.com/ragulka
License: GPL2
*/
/* Copyright 2012 Illimar Tambek (email : [email protected])
This program is free software; you can redistribute it and/or modify
...
Became this:
...
Author URI: https://github.com/ragulka
License: GPL2
Copyright 2012 Illimar Tambek (email : [email protected])
This program is free software; you can redistribute it and/or modify
...
Once I updated the file, I was successfully able to activate the plugin.