Fix Tumblr

fix_tumblr.php

<?php

wp_oembed_remove_provider( '#https?://(.+)\.tumblr\.com/post/.*#i' );
wp_embed_register_handler( 'tumblr', '#https?://(.+)\.tumblr\.com/post/.*#i', function( $matches, $attr, $url, $rawattr ) {
    $wp_oembed = _wp_oembed_get_object();
    $args = '';
    $provider = 'https://www.tumblr.com/oembed/1.0';
    if( false === $data = $wp_oembed->fetch( $provider, $url, $args ) ) {
        return false;
    }
    if( property_exists( $data, 'response' ) ) {
        $data = json_decode( $data->response );
    }
	return apply_filters( 'oembed_result', $wp_oembed->data2html( $data, $url ), $url, $args );
} );