GCC compiler in CLION not found in PATH so cannot compile simple C++ program

When I try to compile a simple main.cpp consisting of:

#include <iostream>int main() {    std::cout << "Hello, World!"<< std::endl;    return 0;}

CLION tells me that:

-- The C compiler identification is GNU 9.3.0-- The CXX compiler identification is GNU 9.3.0CMake Error at CMakeLists.txt:2 (project):  The CMAKE_C_COMPILER:    C:/cygwin64/bin/gcc.exe  is not a full path and was not found in the PATH.  Tell CMake where to find the compiler by setting either the environment  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to  the compiler, or to the compiler name if it is in the PATH.

I get the same block of messages for the CMAKE_CXX_COMPILER: referring to file C:/cygwin64/bin/g++.exe.

Both MAKE files exist in folder C:\cygwin64\bin and this path is referred to as an environment variable in Windows.

Looking at other questions posted concerning this kind of problem, I have checked the version settings of the compiler in CLION and I have:

And the MAKE settings are:

Can anyone please advise what I am missing here in order for the program to build and run?

In the CMakeLists.txt file I have also specified:

cmake_minimum_required(VERSION 3.16)project(HelloWorld1)set(CMAKE_C_COMPILER C:\cygwin64\bin)set(CMAKE_CXX_COMPILER C:\cygwin64\bin)add_executable(HelloWorld1 main.cpp)

But the result is still the same.