Refit API response of a collection of an object is NULL even though ASP.NET Core backend checks for null and gives a 200

I am retrieving a list of objects from ASP.NET Core backend to my .NET MAUI frontend with the Refit API.

Here is my controller:

[Route("api/Database/[controller]")][ApiController]public class StatementsController : ControllerBase{    // ...    [HttpGet("GetStatementFromUserGuid")]    public async Task<IActionResult> GetStatementFromUserGuid([FromQuery] Guid guid, [FromQuery] StatementViewOrder statementViewOrder, [FromQuery] int ReturnLoad = 5)    {        var user = await _controllerAssist.GuidAssist(guid).GetUserFromQueriesAsync(u => u.Statements);        if (user == null)        {             return NotFound();         }        if (user.Statements.Count == 0)        {            return NoContent();        }        List<StatementQuickView> views = user.Statements.GetStatementQuickViewFromRawStatements(statementViewOrder, ReturnLoad);        if (views.Count == 0 || views == null || views.Capacity == 0)        {            return StatusCode(500, "Error retrieving data");        }        Console.WriteLine("\n\n\n" + views.Count.ToString());        Console.WriteLine(views.ToString());        return Ok(views);    }}

I checked multiple times for a null list or empty list which would return a different http status code.

This is the interface in the frontend with Refit:

[Get("/api/Database/Statements/GetStatementFromUserGuid")]Task<ApiResponse<List<StatementQuickView>>> GetStatementFromUserGuid([Query] Guid guid, [Query] StatementViewOrder statementViewOrder, [Query] int ReturnLoad = 5);

This is my API service:

public async Task<List<StatementQuickView>?> SeeStatementsFromUserAsync(Guid guid, StatementViewOrder statementViewOrder, int ReturnLoad = 5){     var Data = await statementApi.GetStatementFromUserGuid(guid, statementViewOrder, ReturnLoad);     if (Data.IsSuccessStatusCode)     {         ConfirmationHandler.CreateConfirmation("true");     }     if (Data.Content == null)     {         ErrorHandler.CreateErrorPopUp("NULL");         return null;     }     switch (Data.StatusCode)     {         case System.Net.HttpStatusCode.OK:             ConfirmationHandler.CreateConfirmation(Data.Content.Count.ToString());             return Data.Content;                         case System.Net.HttpStatusCode.InternalServerError:             ErrorHandler.CreateErrorPopUp("Server Error");             return null;         default:             ErrorHandler.CreateErrorPopUp(Data.StatusCode.ToString());             return null;     }}

Currently, the status code is 200 and Data.Content is NULL.

Using Swagger on the backend, I never got a null result.

This is the size of the payload that would be transferred :

{"$id": "1","$values": [    {"$id": "2","statementID": "57d8f6c9-6f05-4aa3-a169-5585b8940ea1","authorID": "7af20928-c6de-4f1f-af78-a452ef5fac11","author": "foo","profilePicture": null,"createdAt": "2024-10-06T21:51:57.425993","upvotes": 0,"downvotes": 0,"commentAmount": 0,"body": "blah blah blah","statementType": "General","labels": {"$id": "3","$values": ["string"        ]      }    },    {"$id": "4","statementID": "aaf65ffa-f89d-4560-97ec-6cd3bd7e37ed","authorID": "7af20928-c6de-4f1f-af78-a452ef5fac11","author": "foo","profilePicture": null,"createdAt": "2024-10-06T01:59:01.1006187","upvotes": 0,"downvotes": 0,"commentAmount": 0,"body": "please?","statementType": "General","labels": null    }  ]}

The payload currently can go up to 5 "statements", so if you think that would cause an issue please tell me.

Thanks.