[cappy2]

I had the same problem. I could upload an cover image but got the warning “For better results, make sure to upload an image that is larger than 0px wide, and 225px tall. ”

After entering the following code in /wp-content/plugins/bp-custom.php i could i could upload the image. but it is still not showing.

function your_theme_xprofile_cover_image( $settings = array() ) {
        $settings['width']  = 640;
        $settings['height'] = 300;
	$settings['default_cover'] = '/wp-content/uploads/2014/12/blog_header_640x300.jpg';
 
    return $settings;
}
add_filter( 'bp_before_xprofile_cover_image_settings_parse_args', 'your_theme_xprofile_cover_image', 10, 1 ); // for the members Cover Images
add_filter( 'bp_before_groups_cover_image_settings_parse_args', 'your_theme_xprofile_cover_image', 10, 1 ); // for the groups Cover Images

To test if i can show an cover image i did enter the following CSS code with Firebug and the cover image will show. Unfortunnaly not the one i uploaded 🙁

#buddypress #header-cover-image
height: 300px;
width: 640px;
background-image: url('/wp-content/uploads/2015/12/blog_header_640x300.jpg');

I think i experience this problems because i’m using a child theme, but not sure for that.
See my post: Cover image in child theme