All right! All the requirements have met:

• PHP version >= 5.x
• MySQLi extension for PHP
• GD extension for PHP
• Folder oc-content/uploads exists
• oc-content/uploads folder is writable
• Folder oc-content/downloads exists
• oc-content/downloads folder is writable
• Folder oc-content/languages folder exists
• oc-content/languages folder is writable
• config.php file is writable