How to fix 409 Conflict Issue

I am using laravel 5.6 and used an elite admin template (purchased). in the login page, I have included page CSS and images. but CSS and image file not loaded and through 409 Conflict Error, how to fix it. and also I have checked the Path it's correct and the image and CSS open on a new tab. I don't have knowledge about 409 errors anyone can explain this, why its arised, and how to overcome this error.

<!-- page css -->
    <link href="" rel="stylesheet">
    <!-- Custom CSS -->
    <link href="" rel="stylesheet">

From above code style.min.css loaded but login-register-lock.css araised 409 error.

login-register-lock.css

@import url(http://fonts.googleapis.com/css?family=Poppins:300,400,500,600,700);

/*Theme Colors*/


/**
 * Table Of Content
 *
 *  1. Color system
 *  2. Options
 *  3. Body
 *  4. Typography
 *  5. Breadcrumbs
 *  6. Cards
 *  7. Dropdowns
 *  8. Buttons
 *  9. Typography
 *  10. Progress bars
 *  11. Tables
 *  12. Forms
 *  14. Component
 */


/*******************
Login register and recover password Page
******************/

.login-register {
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
    height: 100%;
    width: 100%;
    padding: 10% 0;
    position: fixed;
}

via Chebli Mohamed