Can not connect to MySQL

I’m trying to connect to my MySQL database on a dedicated server, after the client closes concatenate (goes out) (Function void UNetConnection :: Close (), which is in NetConenection.cpp). The compilation takes place without error, the server has successfully started its work, but when the client closes concatenate - gets an error. I use the official MySQL Connector C ++. Maybe I like that it does not properly connected?

MachineId:F4412F3946E742FE3B70A3A0CFF1B0E5
EpicAccountId:b879a722949044ceb94f37a7925777be

Access violation - code c0000005 (first/second chance not available)

mysqlcppconn!MoveSmall() [f:\dd\vctools\crt\vcruntime\src\string\amd64\memcpy.asm:245]
mysqlcppconn!std::char_traits::copy() [c:\program files (x86)\microsoft visual studio 14.0\vc\include\iosfwd:530]
mysqlcppconn!std::basic_string,std::allocator >::assign() [c:\program files (x86)\microsoft visual studio 14.0\vc\include\xstring:1159]
mysqlcppconn!std::basic_string,std::allocator >::basic_string,std::allocator >() [c:\program files (x86)\microsoft visual studio 14.0\vc\include\xstring:782]
mysqlcppconn!sql::SQLString::SQLString() [d:\libraries\mysql\mysql-connector-c+±1.1.8\cppconn\sqlstring.h:53]
mysqlcppconn!sql::Variant::Variant() [d:\libraries\mysql\mysql-connector-c+±1.1.8\cppconn\variant.h:271]
mysqlcppconn!sql::mysql::MySQL_Connection::MySQL_Connection() [d:\libraries\mysql\mysql-connector-c+±1.1.8\driver\mysql_connection.cpp:133]
mysqlcppconn!sql::mysql::MySQL_Driver::connect() [d:\libraries\mysql\mysql-connector-c+±1.1.8\driver\mysql_driver.cpp:124]
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kernel32
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I was able to connect to the database and I see it in the program, but after I connect, I get out error: _Pnext was 0x17. _Pnext Is in xutility file. What should I do?