Issues with firebase in unity desktop application

So I was creating an application for my final course project and I decided to use Unity. I am pretty new to both Unity and Firebase but I managed to make it all work in the end. So far so good, but when I built it and tested it I realised Firebase was not working. I searched up in this forum and all I could find were solutions to Android, or IOS issues but as far as I know, Firebase should also work for desktop games. So in the game data folders I could find the google-services-desktop.json, set up for my firebase with all the data the google-services.json had.

Some posts I found said that I should make sure SDK is updated in the Package Manager, but it does not even show up (probably because the project is PC, Mac & Linux Standalone platform, I guess); and the rest of the possible solutions I found were related to the Android plugins folder and the "res/values/google-services.xml" file, which I obviously do not have in my Project as it is not an Android game. I thought it should work with that google-services-desktop.json file, but maybe I need other files or something?? I already tried some stuff and I can't really think of any solution to it.

My game only uses the Database (Realtime Database), it has no Auth nor other packages. I use it for an scoreboard mainly, and it works in the Unity Editor but it does not work on the game once it is built. I tested some stuff modifying the scripts but what I found out is that the code stops working when it comes to Initializing the database. This is the piece of code:

FirebaseApp.CheckAndFixDependenciesAsync().ContinueWith(task =>
{
    var dependencyStatus = task.Result;

    if (dependencyStatus == DependencyStatus.Available)
    {
        if (task.IsCompleted)
        {
            reference = FirebaseDatabase.DefaultInstance.RootReference;
            if (LoadsData)
            {
                GetScores();
            }
        }
    }
    else
    {
        Debug.LogError(string.Format(
          "Could not resolve all Firebase dependencies: {0}", dependencyStatus));
    }
})

The script stops when I call this method, and obviously the saving and loading data methods won't work as well.

The project is PC platform and I am using Unity 2019.4.17f1.

If I didn't explain myself well, feel free to ask. I hope I can get some help with this!