Writer shows Fatal Error dialog box.

Hello, I am using LibreOffice_V: 5.0.6.3_Still.
My problem is with LibreOffice Writer, when I go to ‘Insert’ and click on ‘Special Character’, Writer shows Fatal Error dialog box.
I am using Windows 7 Pro 32 bit.
I love LibreOffice, it is cool, but I really need explanation why the fatal error dialog box!