インストール（Step５）でエラー

はじめまして、BaserCMSに興味があり以下の環境でインストールしようとした者です。

■ basercms-3.0.8
■ OS:WindowsServer 2012 R12
■ PHPのバージョン：5.4
■ データベース種類・バージョン：MySQL 5
■ Webサーバー：Apache2.4
■ PHPスキル（自己評価）：初心者

Step４までは順調にいきましたが、Step５にて以下のエラーが表示されインストールが完了できませんでした。
ざっと見た感じCakePHPを動かす設定か権限の問題かなと推測しておりますが、どなたかアドバイスをいただければ
幸いです。

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Warning 内のcode とContextは展開して記載しております
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Warning (2): mkdir(): Invalid argument [CORE\Cake\Utility\Folder.php, line 524]

Code
if (!file_exists($pathname)) {
$old = umask(0);
if (mkdir($pathname, $mode)) {

Context
　$pathname = 'C:\Bitnami\redmine\apache2　　\htdocs\basercms\app\tmp\C:/Bitnami/redmine/apache2/htdocs/basercms'
　$mode = (int) 511
　$nextPathname = 'C:\Bitnami\redmine\apache2\htdocs\basercms\app\tmp'
　$old = (int) 0

mkdir - [internal], line ??
Folder::create() - CORE\Cake\Utility\Folder.php, line 524
Folder::create() - CORE\Cake\Utility\Folder.php, line 521
Folder::create() - CORE\Cake\Utility\Folder.php, line 521
Folder::create() - CORE\Cake\Utility\Folder.php, line 521
checkTmpFolders - CORE\Baser\basics.php, line 417
InstallationsController::step5() - CORE\Baser\Controller\InstallationsController.php, line 304
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - CORE\Cake\Controller\Controller.php, line 490
Dispatcher::_invoke() - CORE\Cake\Routing\Dispatcher.php, line 193
Dispatcher::dispatch() - CORE\Cake\Routing\Dispatcher.php, line 167
[main] - C:\Bitnami\redmine\apache2\htdocs\basercms\app\webroot\index.php, line 151
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Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]

Code
if (!file_exists($pathname)) {
$old = umask(0);
　　 if (mkdir($pathname, $mode)) {

Context
　$pathname = 'C:\Bitnami\redmine\apache2\htdocs\basercms\app\tmp\C:/Bitnami/redmine/apache2/htdocs/basercms'
　$mode = (int) 511
　$nextPathname = 'C:\Bitnami\redmine\apache2\htdocs\basercms\app\tmp'
　$old = (int) 0

mkdir - [internal], line ??
Folder::create() - CORE\Cake\Utility\Folder.php, line 524
Folder::create() - CORE\Cake\Utility\Folder.php, line 521
Folder::create() - CORE\Cake\Utility\Folder.php, line 521
Folder::create() - CORE\Cake\Utility\Folder.php, line 521
checkTmpFolders - CORE\Baser\basics.php, line 418
InstallationsController::step5() - CORE\Baser\Controller\InstallationsController.php, line 304
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - CORE\Cake\Controller\Controller.php, line 490
Dispatcher::_invoke() - CORE\Cake\Routing\Dispatcher.php, line 193
Dispatcher::dispatch() - CORE\Cake\Routing\Dispatcher.php, line 167
[main] - C:\Bitnami\redmine\apache2\htdocs\basercms\app\webroot\index.php, line 151
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以下同じようにWarningが複数つづきました。
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]
Warning (2): mkdir() [function.mkdir]: Invalid argument [CORE\Cake\Utility\Folder.php, line 524]