BUG #14211: i am enable to upload .xlsx file in my postgres database.

The following bug has been logged on the website:

Bug reference: 14211
Logged by: Zubair Alam
Email address: zzia88(at)gmail(dot)com
PostgreSQL version: 9.5.3
Operating system: windows7-x64(64 bit)
Description:

copy person(first_name,last_name,dob,email) from 'D:\person\person.xlsx'
with delimiter ',' csv header encoding 'WIN1256';

my client client_encoding is:- UNICODE
i am running this code on my host machine

At the runtime i am getting this error:-ERROR: invalid byte sequence for
encoding "WIN1256": 0x00
CONTEXT: COPY person, line 1

if i am providing csv header encoding :-'UNICODE(UTF8) then i am getting
this error:-ERROR: invalid byte sequence for encoding "UTF8": 0x00
CONTEXT: COPY person, line 1

********** Error **********

ERROR: invalid byte sequence for encoding "UTF8": 0x00
SQL state: 22021
Context: COPY person, line 1

Please solve this problem as soon as possible and test that code then
provide me that code or solution.