Problemi aggiornamento sito

Partiamo dal sito.

http://znetitaly.altervista.org/

Mi segnala questo errore

Fatal error: Cannot redeclare get_youtube_id() (previously declared in /membri/znetitaly/wp-content/plugins/jetpack/functions.compat.php:22) in /membri/znetitaly/wp-content/plugins/shortcodes/modules/youtube.php on line 111

Ho aggiornato questo mattina alla nuova versione di wordpress.
Quindi dal meno wordpress ho aggiornato solo i plugin ritenuti compatibili con la versione attuale.

A metà aggiornamento è apparsa la pagina in questo modo.
Non riesco ad accedere neanche al menù operativo.
http://znetitaly.altervista.org/wp-login.php


Non ho toccato nulla ma
Andando a interrogare il file function compat nella directory trovo quanto segue:






<?php

if ( !function_exists( 'rawurlencode_deep' ) ) :
/**
* Navigates through an array and raw encodes the values to be used in a URL.
*
* @since WordPress 3.4.0
*
* @param array|string $value The array or string to be encoded.
* @return array|string $value The encoded array (or string from the callback).
*/
function rawurlencode_deep( $value ) {
return is_array( $value ) ? array_map( 'rawurlencode_deep', $value ) : rawurlencode( $value );
}
endif;

if ( !function_exists( 'get_youtube_id' ) ) :
/**
* @param $url Can be just the $url or the whole $atts array
* @return bool|mixed The Youtube video ID
*/
function get_youtube_id( $url ) {
// Do we have an $atts array? Get first att
if ( is_array( $url ) )
$url = $url[0];

$url = youtube_sanitize_url( $url );
$url = parse_url( $url );
$id = false;

if ( ! isset( $url['query'] ) )
return false;

parse_str( $url['query'], $qargs );

if ( ! isset( $qargs['v'] ) && ! isset( $qargs['list'] ) )
return false;

if ( isset( $qargs['list'] ) )
$id = preg_replace( '|[^_a-z0-9-]|i', '', $qargs['list'] );

if ( empty( $id ) )
$id = preg_replace( '|[^_a-z0-9-]|i', '', $qargs['v'] );

return $id;
}
endif;

if ( !function_exists( 'youtube_sanitize_url' ) ) :
/**
* Normalizes a YouTube URL to include a v= parameter and a query string free of encoded ampersands.
*
* @param string $url
* @return string The normalized URL
*/
function youtube_sanitize_url( $url ) {
$url = trim( $url, ' "' );
$url = trim( $url );
$url = str_replace( array( 'youtu.be/', '/v/', '#!v=', '&amp;', '&#038;', 'playlist' ), array( 'youtu.be/?v=', '/?v=', '?v=', '&', '&', 'videoseries' ), $url );

// Replace any extra question marks with ampersands - the result of a URL like "http://www.youtube.com/v/9FhMMmqzbD8?fs=1&hl=en_US" being passed in.
$query_string_start = strpos( $url, "?" );

if ( false !== $query_string_start ) {
$url = substr( $url, 0, $query_string_start + 1 ) . str_replace( "?", "&", substr( $url, $query_string_start + 1 ) );
}

return $url;
}
endif;
"


Idee?

Grazie.