"LNK1120: 2 Unresolved Externals" error when trying to use spdlog logging

Question

So I am using a game engine creation tutorial series on youtube by The Cherno. When we implemented logging into the project, we used a git repo spdlog (https://github.com/gabime/spdlog). Basically, when I tried compiling, I got two three errors:

2>SandboxApp.obj : error LNK2001: unresolved external symbol "private: static class std::shared_ptr Hazel::Log::s_CoreLogger" (?s_CoreLogger@Log@Hazel@@0V?$shared_ptr@Vlogger@spdlog@@@std@@A)

2>SandboxApp.obj : error LNK2001: unresolved external symbol "private: static class std::shared_ptr Hazel::Log::s_ClientLogger" (?s_ClientLogger@Log@Hazel@@0V?$shared_ptr@Vlogger@spdlog@@@std@@A)

2>C:\code\repos\Hazel\Hazel\bin\Debug-x64\Sandbox\Sandbox.exe : fatal error LNK1120: 2 unresolved externals

I have my own git repo if you want to check it out, https://github.com/glebnersisyan/HazelFollow/ otherwise, these are the problematic files:

Log.h:

#pragma once

#include <memory>
#include "Core.h"
#include "spdlog/spdlog.h"

namespace Hazel {
    class HAZEL_API Log
    {
    public:
        static void Init();

        inline static std::shared_ptr<spdlog::logger>& GetCoreLogger() { return s_CoreLogger; }
        inline static std::shared_ptr<spdlog::logger>& GetClientLogger() { return s_ClientLogger; }
    private:
        static std::shared_ptr<spdlog::logger> s_CoreLogger;
        static std::shared_ptr<spdlog::logger> s_ClientLogger;
    };
}

and Log.cpp:

#include "Log.h"

namespace Hazel {

    std::shared_ptr<spdlog::logger> Log::s_CoreLogger;
    std::shared_ptr<spdlog::logger> Log::s_ClientLogger;

    void Log::Init()
    {
        spdlog::set_pattern("%^[%T] %n: %v%$");
    }

}