Error In Blazor Web App

I am getting error in browser console
Project version is .NET 9
Template Blazor Web App Auto Interactive Render

@rendermode @(new InteractiveWebAssemblyRenderMode(false)) after setting data not get loaded and error still there. why data is not get loaded pre render false state?

blazor.web.js:1 
 ManagedError: One or more errors occurred. (Object reference not set to an instance of an object.)
    at sn (marshal-to-js.ts:420:18)
    at Kt.resolve_or_reject (marshal-to-js.ts:315:28)
    at marshal-to-js.ts:363:16
    at marshal-to-js.ts:341:48
    at fr (invoke-js.ts:523:9)
    at Fc (marshal-to-js.ts:341:5)
    at dotnet.native.3c4wvb350q.wasm:0x1f1a4
    at dotnet.native.3c4wvb350q.wasm:0x1c8ae
    at dotnet.native.3c4wvb350q.wasm:0xea19
    at dotnet.native.3c4wvb350q.wasm:0x1ec88
callEntryPoint	@	blazor.web.js:1
await in callEntryPoint		
Hr	@	blazor.web.js:1
await in Hr		
Fr	@	blazor.web.js:1
startWebAssemblyIfNotStarted	@	blazor.web.js:1
resolveRendererIdForDescriptor	@	blazor.web.js:1
determinePendingOperation	@	blazor.web.js:1
refreshRootComponents	@	blazor.web.js:1
(anonymous)	@	blazor.web.js:1
setTimeout		
rootComponentsMayRequireRefresh	@	blazor.web.js:1
onDocumentUpdated	@	blazor.web.js:1
Hi	@	blazor.web.js:1

here is my code

@page "/list"

@inject IDiseaseService _diseasesService
@* @rendermode @(new InteractiveWebAssemblyRenderMode(false)) *@
@rendermode @(new InteractiveWebAssemblyRenderMode(true))

<h3>List</h3>

@if (diseases is not null)
{
    @foreach (var item in diseases.Items)
    {
        @item.Name
        <br />
    }
}

@code {
    PagedResult<Disease> diseases = new();

    protected override async Task OnInitializedAsync()
    {
        var result = await _diseasesService.Get(1, 10, string.Empty, 0);
        if (result?.Value != null)
        {
            diseases = result.Value;
        }              
	} 
}