Program hangs at clBuildProgram

OpenCL
#1

Hello, my kernel was compiling and working as expected but now it hangs at clBuildProgram. Kernel code or OpenCL code on my source didn’t change between two attempts. I also tried building an empty kernel but it still hangs at clBuildProgram.
Here is my C++ code:

    /*
    struct FileData {
      char* Buffer;
      unsigned int Length; }
    */
    #define CL_HPP_ENABLE_EXCEPTIONS
    #define CL_HPP_TARGET_OPENCL_VERSION 200
    #include <CL/opencl.hpp>
    ...
    std::vector< cl::Platform > Platforms;
    cl::Platform::get(&Platforms);
    cl::Platform Platform = Platforms[0];
    
    if (!Platform())
      throw std::runtime_error("No OpenCL platform found.");
    
    std::vector<cl::Device> Devices;
    Platform.getDevices(CL_DEVICE_TYPE_GPU, &Devices);
    cl::Device Device = Devices[0];
    
    if (!Device())
      throw std::runtime_error("No compatible devices found.");
    
    cl::Context Context({ Device });
    cl::Program::Sources Source;
    FileData KernelCode = OpenFile("Source/TestKernel.cl");
    Source.push_back({ KernelCode.Buffer, KernelCode.Length });
    cl::Program Program(Context, Source);
    try
    {
      Program.build({ Device }); // Doesn't return
    }
    catch (cl::Error error)
    {
      std::cerr << Program.getBuildInfo<CL_PROGRAM_BUILD_LOG>(Device) << std::endl;
      throw std::runtime_error("Failed to build the kernel.");
    }
    ...

And my kernel code (TestKernel.cl):

    `__kernel void TestKernel() { }`

Please excuse any bad practice since I’m a beginner and mosty copy pasted this code.
I haven’t provided the rest of the code since it never executes, OpenFile(…) successfully reads the kernel and no exceptions are thrown.

My enviroment:

Visual Studio 2019 Community 16.8.4
Lastest OpenCL C++ headers from here
AMD Radeon RX5700XT (“gfx1010” reported by OpenCL)
Windows 10 version 2004

Thanks.