void TcpServer printHexconst char buffer size_t size if buffer == nullptr stdcout Error Buffer is null! stdendl; return; for size_t i = 0

The error message "terminate called after throwing an instance of 'char const*'" indicates that an exception of type 'char const*' was thrown and not caught within the code.

In the given code snippet, there is no explicit exception handling, so it is likely that an exception is being thrown somewhere else in the code. The exception message "char const*" suggests that there might be an issue with a null pointer or a string literal.

To resolve this issue, you should catch the exception and handle it appropriately. You can add a try-catch block around the code that might be throwing the exception, like this:

try {
    // code that might throw an exception
} catch (const char* e) {
    // handle the exception
    std::cout << "Exception caught: " << e << std::endl;
}

Additionally, you can use a debugger to identify the exact location where the exception is being thrown and investigate the cause of the exception