Hi czechtraveller,

• First of, I think you have to re-format your post, see How do I post a question effectively?
• Check through your code, and reformatting. I have this:

  use warnings;
  use strict;
  
  use Excel::Writer::XLSX;
  
  my $xlsfile = 'Excel in 2007.xlsx';
  
  my $workbook = Excel::Writer::XLSX->new($xlsfile);
  
  # Add a worksheet
  my $worksheet = $workbook->add_worksheet('Inputs');
  
  my %font_basic;    # add your format parameters
  
  my $format1    = $workbook->add_format(%font_basic);
  my $worksheet2 = $workbook->add_worksheet('Results');
  
  $workbook->close();
  [download]

  Which work fine for me, with no error message.
  I think you need check again for where a method like this _quote_sheetname is been used on Excel::Writer::XLSX::Worksheet in your script
• You can as well check Excel::Writer::XLSX::Examples for Excel::Writer::XLSX usage.
• Update:
  "..The problem was in the autofilter() function...what to do to make the xlsx support autofilter method.."
  Why is that? I don't think you have to write your own autofilter method. Autofilter is supported in that module.
  Check this: Example: Autofilter
  Except, you have something else in mind.