My XOOPS only says:

This page cannot be displayed due to an internal error.

If you are the administrator of this site, please visit the XOOPS Troubleshooting Page for assistance.

Notice [PHP]: Undefined index: enable_badips in file class/xoopssecurity.php line 212
Notice [PHP]: Undefined index: language in file include/common.php line 152
Notice [PHP]: Undefined index: language in file include/common.php line 172
Error [Xoops]: Class XoopsProfileHandler does not exist
Handler Name: profile in file include/functions.php line 564

But,why???