How to allow type conversions in Visual Studio C++

I'm working with an old C++ application that has been certified for a certain system. So, I'm not allowed to make any changes. However, I have to make a new build in Visual Studio 2019. I am running into a lot of conversions issues like this.

void sendMsg(char* msg)
{
    // code
}

int main()
{
    sendMsg("hello");
}

> [Error (active) E0167 argument of type "const char" is incompatible with parameter of type "char".]

Is there a setting in Visual Studio I can use to allow these types of conversions to happen?

Thanks, @Swift! Using /permissive worked like a charm.

I probably should have given a few more details.

1. As I said, I don't have the option of changing the code.
2. I have to get it built in Visual Studio 2019.
3. The original code was written for a much older version of C++

The points that I did not mention before were:

1. This was a complete and functioning Linux application.

   a) Since the application was complete, no new development
   was going to happen. Therefore, I did not care about
   error checking.

2. I needed to build a Windows version of the application in VS.

3. The code base contained thousands of files. Changing all of them
   would have exceeded my time budget.

4. There may be a new version of the Linux build. I did not want
   to introduce possible issues with a code base that was previously
   stable. I also didn't want to maintain two code bases.