React.js dot NET component not found error

Question

Any idea about below error?

Could not find a component named 'MainLayout'. Did you forget 
to add it to App_Start\ReactConfig.cs?
Description: An unhandled exception occurred.
Exception Details: React.Exceptions.ReactInvalidComponentException: Could not find a component named 'MainLayout'. Did you 
forget to add it to App_Start\ReactConfig.cs?
Source Error:
Line 119: if (ReactSettingsProvider.Current.EnableClientSide && 
!isEditingOverrideEnabled)
Line 120: {
Line 121: writer.WriteLine(reactComponent.RenderHtml());
Line 122:
Line 123: var tagBuilder = new TagBuilder("script")
Source File: C:\Project\HenryFord\Sitecore\src\Foundation\React\code\Mvc\JsxView.cs Line: 121
[ReactInvalidComponentException: Could not find a component named 
'MainLayout'. Did you forget to add it to App_Start\ReactConfig.cs?]
 React.ReactComponent.EnsureComponentExists() in 
D:\a\1\s\src\React.Core\ReactComponent.cs:279

Server.min.js has component Mainlayout code still in backend we get error “could not find a component named Mainlayout”.

Please let me know if more information is required. Thanks.