banban

500のエラー確認しましたが問題ありませんでした。

[日本語訳]
内部エラーが発生しています。
本サーバーは、「CGI・PHPプログラムの中の間違い」「または間違った設定」「完了できない要求」に遭遇しました。
[原因と対処]
.htaccessの「記述（Options など）」「書式」「文字コード・改行コード」に問題がる
PHPに関する設定をphp.iniにせず、.htaccessに PHP_Flag や PHP_Value など記述している
CGI・PHPのパーミッション等、設定に誤りがある(705 または 755 に設定していない))
CGI・PHPプログラムが正しく動作していない

.htaccessの変更しておりません。

# BEGIN SAKURA Internet Inc.
<IfModule mod_deflate.c>
    SetOutputFilter DEFLATE
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE application/x-javascript application/javascript application/ecmascript
</IfModule>
<IfModule mod_expires.c>
    ExpiresActive On
    <FilesMatch "\.(css|js)$">
        ExpiresDefault "access plus 1 week"
    </FilesMatch>
    <FilesMatch "\.(gif|jpe?g|png)$">
        ExpiresDefault "access plus 1 month"
    </FilesMatch>
</IfModule>
# END SAKURA Internet Inc.

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wp/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wp/index.php [L]
</IfModule>

# END WordPress

よろしくお願いいたします

wp-config.phpがＢＯＭありになっていました！！
これで解決して、管理画面にログインできました。
本当にありがとうございました

topページの不要なタグを修正しました。
プラグインを全て停止してもなおりませんでした。

サイドバーが下部のままです

@charset "utf-8";
/*
Theme Name: BizVektor
Theme URI: http://bizvektor.com
Description: BizVektor theme will allow you to build a high-quality web site. It is possible to change the color, to switch to a completely different design. In addition, it is also possible to increase the number of designs by plug-ins.
Author: Vektor,Inc.
Author URI: http://www.vektor-inc.co.jp
Version: 1.7.3

Tags: white, red, blue, black, green, orange, purple, two-columns, right-sidebar, left-sidebar, custom-background, custom-colors, custom-header, custom-menu, editor-style,theme-options
Text Domain: biz-vektor
License: GNU General Public License
License URI: license.txt

BizVektor WordPress theme, Copyright (C) 2014 Vektor,Inc.
BizVektor WordPress theme is licensed under the GPL.

.sticky {}
.bypostauthor {}

/* branding内の指定 */
#branding hgroup {
	margin: 0 7.6%;
	width: 48%; /* 横幅を48%まで狭めました */
	float: left;
}
#branding address {
	float: right;
	width: 26.8%; /* 横幅を26.8%まで広げました */
	margin-right: 7.6%; /* バランスを整えるために右マージンを追記 */
	padding-top: 3.65625em;
}

/* サイトタイトルと補足説明のマージンを変更 */
#site-title {
	margin-right: 70px; /* デフォルトは270pxでしたが、70pxに */
	padding: 3.65625em 0 0;
}
#site-description {
	color: #7a7a7a;
	font-size: 14px;
	margin: 0 70px 3.65625em 0; /* 右マージンのデフォルトは270pxでしたが、70pxに */
}

/* 以下を追記（クラス名はheader.phpと合わせてお好みで変更してください） */
.address {
	font-size: small;
}
.tel {
	font-size: xx-large;
	text-shadow: 1px 0px 2px #666666;
}
.hours {
	font-size: small;
}
.contact {
	margin-top: .5em;
	text-align: center;
}
.contact a {
	display: block;
/* ボタンジェネレーターで作成したソースコード */
	color: #ffffff;
	font-size: large;
	padding: 10px;
	text-decoration: none;
	-webkit-border-radius: 8px;
	-moz-border-radius: 8px;
	-webkit-box-shadow: 0px 1px 2px #666666;
	-moz-box-shadow: 0px 1px 2px #666666;
	text-shadow: 1px 1px 3px #666666;
	border: solid #cacbcc 1px;
	background: -webkit-gradient(linear, 0 0, 0 100%, from(#42aaff), to(#003366));
	background: -moz-linear-gradient(top, #42aaff, #003366);
}

.contact a:hover {
	background: #42aaff;
/* ボタンジェネレーターで作成したソースコードここまで */
}

スタイルシートを送付いたします。

wp-config.php
<?php
/**
* The base configurations of the WordPress.
*
ちゃんと記載されていました

wp-content/advanced-cache.php ファイルを削除しました。

WP Super Cache をアンインストールする | 愚者の紋章 -The Fool-

以下の手順も試みました。

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/exec-php.php on line 22

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/manager.php on line 36

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/manager.php on line 37

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/manager.php on line 38

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/manager.php on line 39

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/admin.php on line 53

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/admin.php on line 56

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/admin.php on line 57

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/admin.php on line 63

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/admin.php on line 64

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/admin.php on line 79

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/cache.php on line 22

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/cache.php on line 39

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/exec-php/includes/ajax.php on line 64

Strict Standards: Redefining already defined constructor for class FaviconRotator in /home/omiairyoen/www/wp/wp-content/plugins/favicon-rotator/model.php on line 110

Strict Standards: Redefining already defined constructor for class FVRT_Base in /home/omiairyoen/www/wp/wp-content/plugins/favicon-rotator/includes/class.base.php on line 40

Strict Standards: Redefining already defined constructor for class FVRT_Utilities in /home/omiairyoen/www/wp/wp-content/plugins/favicon-rotator/includes/class.utilities.php on line 17

Strict Standards: Redefining already defined constructor for class FVRT_Media in /home/omiairyoen/www/wp/wp-content/plugins/favicon-rotator/includes/class.media.php on line 78

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/omiairyoen/www/wp/wp-config.php:1) in /home/omiairyoen/www/wp/wp-content/plugins/get-in-touch/get-in-touch.php on line 29

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/omiairyoen/www/wp/wp-config.php:1) in /home/omiairyoen/www/wp/wp-content/plugins/get-in-touch/get-in-touch.php on line 29

Notice: Undefined variable: filters in /home/omiairyoen/www/wp/wp-content/plugins/head-cleaner/head-cleaner.php on line 298

Strict Standards: Declaration of KtaiService_Other::in_network() should be compatible with KtaiServices::in_network($networks = NULL, $allow_search_engine = false) in /home/omiairyoen/www/wp/wp-content/plugins/ktai-style/operators/base.php on line 2459

Warning: Cannot modify header information - headers already sent by (output started at /home/omiairyoen/www/wp/wp-config.php:1) in /home/omiairyoen/www/wp/wp-content/plugins/multi-device-switcher/multi-device-switcher.php on line 89

Notice: Undefined index: statpress_action in /home/omiairyoen/www/wp/wp-content/plugins/statpress-reloaded/statpress.php on line 15

Deprecated: Assigning the return value of new by reference is deprecated in /home/omiairyoen/www/wp/wp-content/plugins/wassup/wassup.php on line 3226

Strict Standards: Redefining already defined constructor for class UADetector in /home/omiairyoen/www/wp/wp-content/plugins/wassup/lib/uadetector.class.php on line 69

Strict Standards: Non-static method KtaiServices::get() should not be called statically, assuming $this from incompatible context in /home/omiairyoen/www/wp/wp-content/plugins/ktai-style/ktai_style.php on line 117

Notice: register_sidebar_widget is deprecated since version 2.8! Use wp_register_sidebar_widget() instead. in /home/omiairyoen/www/wp/wp-includes/functions.php on line 3391

Notice: register_widget_control is deprecated since version 2.8! Use wp_register_widget_control() instead. in /home/omiairyoen/www/wp/wp-includes/functions.php on line 3391

Notice: register_sidebar_widget is deprecated since version 2.8! Use wp_register_sidebar_widget() instead. in /home/omiairyoen/www/wp/wp-includes/functions.php on line 3391

Notice: register_widget_control is deprecated since version 2.8! Use wp_register_widget_control() instead. in /home/omiairyoen/www/wp/wp-includes/functions.php on line 3391

Notice: register_sidebar_widget の使用はバージョン 2.8 から非推奨になっています! 代わりに wp_register_sidebar_widget() を使ってください。 in /home/omiairyoen/www/wp/wp-includes/functions.php on line 3391

Notice: register_widget_control の使用はバージョン 2.8 から非推奨になっています! 代わりに wp_register_widget_control() を使ってください。 in /home/omiairyoen/www/wp/wp-includes/functions.php on line 3391

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method ogp__open_graph_pro::init() should not be called statically in /home/omiairyoen/www/wp/wp-includes/plugin.php on line 496

Notice: load_plugin_textdomain がバージョン 2.7 から非推奨になった引数付きで呼び出されました。代替は用意されていません。 in /home/omiairyoen/www/wp/wp-includes/functions.php on line 3510

Warning: Cannot modify header information - headers already sent by (output started at /home/omiairyoen/www/wp/wp-config.php:1) in /home/omiairyoen/www/wp/wp-content/plugins/wassup/wassup.php on line 2001

Warning: Cannot modify header information - headers already sent by (output started at /home/omiairyoen/www/wp/wp-config.php:1) in /home/omiairyoen/www/wp/wp-login.php on line 425

Warning: Cannot modify header information - headers already sent by (output started at /home/omiairyoen/www/wp/wp-config.php:1) in /home/omiairyoen/www/wp/wp-login.php on line 438

Warning: Cannot modify header information - headers already sent by (output started at /home/omiairyoen/www/wp/wp-config.php:1) in /home/omiairyoen/www/wp/wp-login.php on line 440
Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method ogp__open_graph_pro::language_attributes() should not be called statically in /home/omiairyoen/www/wp/wp-includes/plugin.php on line 213
lang="ja" itemscope itemtype="http://schema.org/WebSite" prefix="og: http://ogp.me/ns#" xmlns:og="http://ogp.me/ns#">

現状のバグです

下記も削除しました
cacheフォルダ
advanced-cache.phpファイル
wp-cache-config.phpファイル

wp-config.phpの記述内容も確認し削除しました
確認しました

//define(‘WP_CACHE’, true); //Added by WP-Cache Manager（削除）
//define( ‘WPCACHEHOME’, ‘/home/omiairyoen/www/wp/wp-content/plugins/wp-super-cache/’ ); //Added by WP-Cache Manager（削除）

元にもどらないです

返事ありがとうございます

WP Super Cache プラグインをリネームしています。
WP Super Cache-1のフォルダごとリネームしています

再度確認しましたがアクセスできないです。

管理画面が真っ白になる前にfanctionをいじっていたのですが
新たにファイルを元にもどしても管理画面真っ白のままです

[モデレーター編集: 長すぎるコード引用部分を削除しました。コードの投稿にはペーストビンサービスを利用してください。]