OpenCL cannot find device - c++

Question

I'm making a C++ program using opencl. It was really challenging to install it but I've finally managed to install it. I'm on Ubuntu 22.04, nvdia-390 GPU, intel core i7 gen3 CPU,
and my clinfo gives this output:
Number of platforms 1
Platform Name Clover
Platform Vendor Mesa
Platform Version OpenCL 1.1 Mesa 22.0.5
Platform Profile FULL_PROFILE
Platform Extensions cl_khr_icd
Platform Extensions function suffix MESA
Platform Name Clover
Number of devices 0
NULL platform behavior
clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) Clover
clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) No devices found in platform [Clover?]
clCreateContext(NULL, ...) [default] No devices found in platform
clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) No devices found in platform
clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) No devices found in platform
clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) No devices found in platform
clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR) No devices found in platform
clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM) No devices found in platform
clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL) No devices found in platform
ICD loader properties
ICD loader Name OpenCL ICD Loader
ICD loader Vendor OCL Icd free software
ICD loader Version 2.2.14
ICD loader Profile OpenCL 3.0
For some reason it cannot detect my devices. I've ran sudo apt install mesa-opencl-icd to make it finally work. When I create a C++ program to test it I get this error:
Here is my main:
#include <CL/cl.h>
#include <iostream>
int main(int argc, char* argv[])
{
cl_uint dev_cnt = 0;
cl_device_id m_device_id;
clGetPlatformIDs(0, NULL, &dev_cnt);
std::unique_ptr<cl_platform_id[]> platform_ids(new cl_platform_id[dev_cnt]);
clGetPlatformIDs(dev_cnt, platform_ids.get(), NULL);
std::cout << dev_cnt << std::endl;
int error_code = clGetDeviceIDs(platform_ids.get()[0],
CL_DEVICE_TYPE_DEFAULT,
1,
m_device_id,
NULL);
if (error_code != CL_SUCCESS)
{
std::cout << "FATAL ERROR: Failed to create a device group! Error code: " << std::endl;
return;
}
}
I get the error message as an output. I've tried changing the device type to default to no avail.
What's the problem? I don't quite remember the exact steps of how I've installed opencl but I can say it was really hard. What is missing?