Android Studio ImageView shows a white image

I am adding an image to my LinearLayout. Something very basic.

<ImageView
    android:id="@+id/my_logo"
    android:layout_width="55dp"
    android:layout_height="55dp"
    android:layout_gravity="left"
    android:src="@drawable/img_logo" />

Right click on the project folders, New > Image Asset > Asset type select image and choose the path to a my_logo.png or my_logo.jpg file. But both in Design and on my phone I only see a white square