[Koha] Error - Exported database from the tools

[Shivendra]

When I Exported database from the tools menu fails with the message
Internal Server Error


Can't use an undefined value as a HASH reference at
/usr/share/koha/intranet/cgi-bin/tools/export.pl line 75

For help, please send mail to the webmaster ([no address given]),
giving this error message
and the time and date of the error.

I am using Koha version 16.11.05


Please help me


-- 
Shivendra
9815526163