I found the issue. It was actually a bug in the theme. The bug is in the
login.php file found here:
On line 385 they are calling the
wp_login action, but they are nor passing the
$user object which causes Link to fail as it needs that object and they really should be passing it. This would break any plugin that relies on that object in this action.
I fixed the file by changing this:
do_action('wp_login', $user_login, $user);
That should fix it.
If you have a few minutes, I would truly appreciate a review. Many thanks in advance!