Why my font are not loading from font-face. Please i have been stucked here for a long time

Question

Hellow i have stuck and I can't understand why @font face working. I have a folder named "Fonts" and a folder named "Poppins". Is there any wrong in this code.

@font-face {
    font-family: 'Poppins', sans-serif;
    font-style: normal;
    font-weight: 100;
    src: url('../Fonts/Poppins/Poppins-Thin.ttf') format("truetype");
}
@font-face {
    font-family: 'Poppins', sans-serif;
    font-style: italic;
    font-weight: 100;
    src: url('../Fonts/Poppins/Poppins-ThinItalic.ttf') format("truetype");
}
@font-face {
    font-family: 'Poppins', sans-serif;
    font-style: normal;
    font-weight: 200;
    src: url('../Fonts/Poppins/Poppins-ExtraLight.ttf') format("truetype");
}