Dropdown error after upgrade

I am getting the below error on clicking dropdown after i upgraded from 3.0.1 to 3.1.4

Error:
Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100] Unhandled exception rendering component: Could not find 'Radzen.selectListItem' ('selectListItem' was undefined). Microsoft.JSInterop.JSException: Could not find 'Radzen.selectListItem' ('selectListItem' was undefined). Error: Could not find 'Radzen.selectListItem' ('selectListItem' was undefined).

My Control:
<RadzenDropDown @ref="ddEmployees" AllowClear="true" TValue="string" Data="employees" Change="OnChanged" FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive" AllowFiltering="true" Placeholder="Select ..." ValueProperty="Id" TextProperty="Name" @bind-Value="item.Employee" />

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