Various errors on opening gantt and reloading

[Dingo]

I have been getting a few errors in my developer console : can you explain what they are an how to fix

The below error occurs but my gantt is successfully rendered.

o is null

getModelObject@http://md2ehcc.ad001.net:5002/_content/Syncfusion.Blazor/scripts/syncfusion-blazor.min.js:1:150728

updateOldProperties@http://md2ehcc.ad001.net:5002/_content/Syncfusion.Blazor/scripts/syncfusion-blazor.min.js:1:151206

setModel@http://md2ehcc.ad001.net:5002/_content/Syncfusion.Blazor/scripts/syncfusion-blazor.min.js:1:149802

beginInvokeJSFromDotNet/r<@http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:8:31619

beginInvokeJSFromDotNet@http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:8:31587

E</e.prototype.invokeClientMethod/<@http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1:20052

E</e.prototype.invokeClientMethod@http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1:20022

E</e.prototype.processIncomingData@http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1:18006

e/this.connection.onreceive@http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1:11091

D</e.prototype.connect/</</</i.onmessage@http://md2ehcc.ad001:5002/_framework/blazor.server.js:1:39007

When i reload the page, the component does not render and i get this error

Uncaught (in promise) WebSocket is not in the OPEN state

reject http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1

    sendLoop http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1

    s http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1

    s http://md2ehcc.ad001.net:5002/_framework/blazor.server.js:1

    s http://md2ehcc.ad001net:5002/_framework/blazor.server.js:1

And after i have received that error, when i goto another page that holds my gant chart, it wont load and i receive this

[2020-12-02T20:02:30.500Z] Error: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.

   at System.Collections.Generic.List`1.Enumerator.MoveNextRare()

   at Syncfusion.Blazor.BaseComponent.InitComponent()

   at Syncfusion.Blazor.BaseComponent.OnAfterRenderAsync(Boolean firstRender)

   at Syncfusion.Blazor.Gantt.SfGantt`1.OnHybridAfterRender(Boolean firstRender)

   at Syncfusion.Blazor.Gantt.SfGantt`1.OnAfterRenderAsync(Boolean firstRender)

   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle)

[Karthikeyan Raja]

Hi Dingo,

We have analyzed your queries and ensured at our end. But we are unable to reproduce the reported issues at our end.  

So please share your Syncfusion blazor nuget version, code snippet,  Otherwise please modify your changes in our sample with issue reproducing state, So that we can assist you. 

Sample - https://www.syncfusion.com/downloads/support/directtrac/general/ze/BlazorApp_latest_18.3.52316325780  

 

Please let us know if you have any concerns 

  

Regards, 

Karthikeyan Raja