Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
Unhandled exception rendering component: Object of type 'Syncfusion.Blazor.DataForm.FormGroup' does not have a property matching the name 'ColumnSpan'.
System.InvalidOperationException: Object of type 'Syncfusion.Blazor.DataForm.FormGroup' does not have a property matching the name 'ColumnSpan'.
But check the link, it says ColumnSpan does exist.
Class FormGroup - Blazor API Reference | Syncfusion