I have updated the controls to version (20.1.0.50), I have added to the Program.cs file the line:
builder.Services.AddSyncfusionBlazor(options => { options.IgnoreScriptIsolation = false; });
And to the index.hml file
<script src="https://cdn.syncfusion.com/blazor/20.1.47/syncfusion-blazor.min.js" type="text/javascript"></script>
And now it gives the following error and does not load the controls