请确保已安装系统扩展"t3skin".它带有默认外观，并随TYPO3一起提供.

Please make sure that you have installed the system extension "t3skin". It brings the default skin and is shipped with TYPO3.

如果已安装，请检查您的.htaccess是否启用了gzip规则，以防您设置了$ TYPO3_CONF_VARS ['BE'] ['compressionLevel'].

If it is installed, check whether your .htaccess has the gzip rules enabled, in case of you have $TYPO3_CONF_VARS['BE']['compressionLevel'] set.