codeigniter form_error() not showing error beside form-control - codeigniter

Question

I am trying to show validation errors beside the form-control but form_error() is not working.
codeigniter form_error() not showing error beside form-control
The validation_errors() is working but form_error() not working beside the input control
Admin Controller
<?php
class Admin extends CI_Controller
{
public function index()
{
$this->load->library('form_validation');
$this->form_validation->set_rules('uname','Username','required|alpha');
$this->form_validation->set_rules('pass','Password','required|max_length[12]');
$this->form_validation->set_error_delimiters("<div class='text-danger'>","</div>");
if($this->form_validation->run())
{
echo "Validation successful";
}
else
{
//echo validation_errors();
$this->load->view('Users/articleList');
}
}
}
?>
The view is
application/views/Users
<?php include('header.php'); ?>
<div class="container" style="margin-top:20px";>
<h1> Admin Form </h1>
<?php echo form_open('admin/index');?>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label for="Username">Username</label>
<?php echo form_input(['class'=>'form-control', 'placeholder'=>'Enter Username','name'=>'uname']);?>
</div>
</div>
<div class="col-lg-6">
<?php form_error('uname');?>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label for="Password">Password</label>
<?php echo form_password(['class'=>'form-control','type'=>'password',
'placeholder'=>'Enter Password', 'name'=>'pass'
]);?>
</div>
<div class="col-lg-6">
<?php form_error('pass');?>
</div>
</div>
</div>
<?php echo form_submit(['type'=>'submit', 'class'=>'btn btn-default','value'=>'Submit']); ?>
<?php echo form_reset(['type'=>'submit', 'class'=>'btn btn-default','value'=>'Reset']); ?>
</div>
<?php echo validation_errors();?>
<?php include('footer.php'); ?>

Answer 1

You need to echo the form_error so...
<?php form_error('pass');?>
becomes
<?php echo form_error('pass');?>
or
<?= form_error('pass');?>