MudBlazor MudAutocomplete got error after updating MudBlazor to version 8

While working on a Blazor project. The razor page was functioning correctly until I updated MudBlazor to version 8. At first, code was working as expected, but when I updated the version, I am having CS1666 and CS0123 error now. What am I missing on the updates?

My Code :

<EditForm Model="accountrole" OnValidSubmit="OnValidSubmit">
    <DataAnno2tationsValidator />
    <MudDialog>
        <DialogContent>
            @if (accountrole.AccountRoleID > -1)
            {
                <MudAutocomplete T=Account
                Label="Account"
                @bind-Value="selectedAccount"
                SearchFunc=SearchAcc
                Variant="Variant.Outlined"
                Clearable="true"
                ToStringFunc="@(e=> e==null?null : $"{e.AccountName}")" />

                <MudAutocomplete Class="mt-3"
                T=Role
                Label="Account"
                @bind-Value="selectedRole"
                SearchFunc=SearchRole
                Variant="Variant.Outlined"
                Clearable="true"
                ToStringFunc="@(e=> e is null ? null : $"{e.Title}")" />
            }
        </DialogContent>
        <DialogActions>
            <MudButton OnClick="Cancel">Cancel</MudButton>
            <MudButton ButtonType="ButtonType.Submit"
            Variant="Variant.Filled"
            Color="MudBlazor.Color.Primary">
                @(mode == "edit" ? "Update" : "Save")
            </MudButton>
        </DialogActions>
    </MudDialog>
</EditForm>

@code {
    bool success;

    [Parameter] public AccountRole accountrole { get; set; } = new AccountRole();
    [Parameter] public List<Account> accountList { get; set; } = new List<Account>();
    [Parameter] public List<Role> roleList { get; set; } = new List<Role>();
    [Parameter] public string? mode { get; set; }
    [CascadingParameter] IMudDialogInstance? MudDialog { get; set; }

    void Submit() => MudDialog?.Close(DialogResult.Ok(true));
    void Cancel() => MudDialog?.Cancel();

    private async Task OnValidSubmit(EditContext context)
    {
        success = true;
        await addAccountRole();
    }

    // AUTOCOMPLETE FOR Account
    //public Account account { get; set; } = new Account();
    private Account? selectedAccount;
    private async Task<IEnumerable<Account>> SearchAcc(string value)
    {
        StateHasChanged();
        await Task.Delay(5);
        await Task.Yield();
        return (string.IsNullOrEmpty(value)) ? accountList : accountList.Where(x => x.AccountName.Contains(value, StringComparison.InvariantCultureIgnoreCase));
    }

    // AUTOCOMPLETE FOR Role
    //public Role role { get; set; } = new Role();
    private Role? selectedRole;
    private async Task<IEnumerable<Role>> SearchRole(string value)
    {
        StateHasChanged();
        await Task.Delay(5);
        return (string.IsNullOrEmpty(value)) ? roleList : roleList.Where(x => x.Title.Contains(value, StringComparison.InvariantCultureIgnoreCase));
    }
}

And I getting these error

I just figured out the answer to the problem. I just added CancellationToken argument to the functions:

From:

private async Task<IEnumerable<Account>> SearchAcc(string value) {...}
private async Task<IEnumerable<Role>> SearchRole(string value) {...}

To:

private async Task<IEnumerable<Account>> SearchAcc(string value, CancellationToken token) {...}
private async Task<IEnumerable<Role>> SearchRole(string value, CancellationToken token) {...}