Error: Can't upload files

When I try to upload files to the file gallery via treasury I get this error:

Notice: Undefined index: galleryContentIds in /homepages/36/d180000542/htdocs/sites/cloyne/treasury/TreasuryItem.php on line 242

Warning: Invalid argument supplied for foreach() in /homepages/36/d180000542/htdocs/sites/cloyne/treasury/TreasuryItem.php on line 242

Warning: Cannot modify header information - headers already sent by (output started at /homepages/36/d180000542/htdocs/sites/cloyne/treasury/TreasuryItem.php:242) in /homepages/36/d180000542/htdocs/sites/cloyne/kernel/kernel_lib.php on line 674

Please help me, is there a way to fix this?