compile error c++

[CARLOS EDUARDO PIRES DE SÁ]

   UniString( const char * Str ) : m_string( Str ), m_wstring( m_string.begin(), m_string.end() ) {}
    UniString( const std::string & Str ) : m_string( Str ), m_wstring( m_string.begin(), m_string.end() ) {}

    UniString( const wchar_t * Str ) : m_wstring( Str )
    {
        m_string = UTF8Encoder::From_wstring( m_wstring );
    }
    UniString( const std::wstring & Str ) : m_wstring( Str )
    {
        m_string = UTF8Encoder::From_wstring( m_wstring );
    }

error
:\novavarredura\emdesenvolvimento\cck_csv\simplexlsxdef.h(57) : error C2664: '__thiscall std::basic_string<unsigned short,struct="" std::char_traits\<unsigned="" short="">,class std::allocator\<unsigned short=""> >::std::basic_string<unsigned short,struct="" std::c="" har_traits\<unsigned="" short="">,class std::allocator\<unsigned short=""> >(const unsigned short ,unsigned int,const class std::allocator<unsigned short=""> &)' : cannot convert parameter 1 from 'char </unsigned>' to 'const unsigned short '
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
c:\novavarredura\emdesenvolvimento\cck_csv\simplexlsxdef.h(58) : error C2664: '__thiscall std::basic_string<unsigned short,struct="" std::char_traits\<unsigned="" short="">,class std::allocator\<unsigned short=""> >::std::basic_string<unsigned short,struct="" std::c="" har_traits\<unsigned="" short="">,class std::allocator\<unsigned short=""> >(const unsigned short </unsigned></unsigned></unsigned></unsigned>,unsigned int,const class std::allocator<unsigned short=""> &)' : cannot convert parameter 1 from 'char ' to 'const unsigned short '
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast</unsigned></unsigned></unsigned></unsigned></unsigned>

[Alexandr Belyak]

Hello CARLOS EDUARDO PIRES DE SÁ,
Thanks for the feedback.
What version of the compiler and its launch options? What version of the operating system?
Can you provide a minimal example of a program with such an error?