ArgumentNull exception when using SFDashboardLayout in blazor server app - Syncfusion.Blazor(19.4.0.55)

Question

Using the following code sample to display a basic Dashboard Layout, and receiving an argument null exception.I'm building a Blazor server application on .NET 6.0 framework.

System.ArgumentNullException: Value cannot be null. (Parameter 'json')   at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)   at Syncfusion.Blazor.Layouts.SfDashboardLayout.Initialize()   at Syncfusion.Blazor.Layouts.SfDashboardLayout.OnAfterScriptRendered()   at Syncfusion.Blazor.SfBaseComponent.OnAfterRenderAsync(Boolean firstRender)   at Syncfusion.Blazor.Layouts.SfDashboardLayout.OnAfterRenderAsync(Boolean firstRender)   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)Syncfusion.Blazor version used - 19.4.0.55

Indhumathy Loganathan · Answer

Hi Neethu,  
 
Thanks for contacting Syncfusion Support.  
 
We cannot view the shared code example as it appears blank. However, we have prepared a Blazor Server application with a Dashboard Layout component in the specified package version. but we were unable to replicate the issue at our end. We suspect that the reported issue may have occurred due to a missing script reference on your end. Please see below documentation link. 
 
https://blazor.syncfusion.com/documentation/dashboard-layout/getting-started#add-script-reference 
 
We also prepared a sample for your reference. Please see the link below for the sample. 
 
https://www.syncfusion.com/downloads/support/forum/173638/ze/SfDashboardLayout-1915181097 
 
If further assistance is required, please update the sample in the following file formats: *.zip, *.rar, *.zipx, or *.7z. It would help us provide a solution promptly. 
 
Regards, 
Indhumathy L