I’m also having this issue, however it doesn’t matter what size the image is, or extension. Theme is up to date (just did a reinstall) as is WordPress.

*EDIT*
I put the below code in functions.php, and problem was solved.

add_filter( 'wp_image_editors', 'change_graphic_lib' );

function change_graphic_lib($array) {
return array( 'WP_Image_Editor_GD', 'WP_Image_Editor_Imagick' );
}

• This reply was modified 8 years, 6 months ago by AdamBlumFGE.