D:\LeStoreDownload\3271833\main.cpp|8|error: expected primary-expression before '<<' token|

This error message typically occurs when there is a syntax error in the code. In this case, it seems like the code is trying to use the "<<" operator in an incorrect way.

Without seeing the full code and context, it's difficult to provide a specific solution. However, some common reasons for this error may include:

- Forgetting to include the necessary header files
- Using the "<<" operator with incorrect operands or syntax
- Typo or error in the code that is causing the compiler to misinterpret the intended meaning.

To resolve this error, you should carefully review the code and identify any syntax errors or incorrect usage of operators. You may also want to consult the documentation or seek advice from other developers to help identify and fix the issue.