corrupted file when save using password

[filipdns]

Hello,

I need to protect the output file but when I'm using:

wb.save(filename);

it work fine, save without problem but when I'm using

wb.save(filename, password);

the file is created, the size is fine but I can not open it, when I try to do, excel program is opening virgin, no any sheet, just empty.

I'm under windows 10, Qt 5.15.1 32 bit MSVC2019, with pro file config with c++ 14.

Could you help me please?

Thank you very much