CI 3.0.7 don't see APPPATH. Why?

Hi!
My controller

PHP Code:

public function getorders()
    {
        $apiKey = '*****';
        $apiSecret = '***';
       
        require_once APPPATH.'libraries/Client.php'; 


Why is CI don't see libraries folder? 
Severity: Warning

Message: require_once(C:\OSPanel\domains\site3\application\libraries/Client.php): failed to open stream: No such file or directory

Er, your title is misleading. CI does see APPPATH - that is obvious from your error message.
The error message suggests that Client.php is not in that location.

Curious, but why wouldn't you use $this->load->library('client') ? That is the "CI way".

I tried to connect it like you said .. also does not work (
Here's what I want to connect ..
https://github.com/edsonmedina/bittrex

Er, your title is misleading. CI does see APPPATH - that is obvious from your error message.
The error message suggests that Client.php is not in that location.

Curious, but why wouldn't you use $this->load->library('client') ? That is the "CI way".

Attached Files

Thumbnail(s)
   

P.S. i'm used last version (3.1.7, php 7.2)

Your path has all backslashes, until the end, where it has /Client.php.

Maybe try using a backslash?

in client.php remark out the name space.

PHP Code:

// Load the library
$this->load->library('client');

// Create a new instants of client
$test = new client($apiKey, $apiSecret); 


Load it like any other CodeIgniter Library...

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

I solved the problem ..
If you connect as a library - it does not work, because there is a call right away
If you connect as a helper - it works. Because when connected helper is not immediately called
Thank you