Troubleshooting

• Aug 15, 2025
• 2 minutes to read

This section describes common issues and steps you can follow to diagnose and resolve these issues. If the solutions listed here do not help, create a ticket in our Support Center and attach a reproducible sample project.

Installation Issues

• Package Installation or Update Fails with an Error

Performance-Related Issues

• Troubleshoot Performance-Related Issues

Version-Related Issues

• Update to a new version
• Could not find ‘X’ in ‘window.DxBlazor’

Resources-Related Issues

• Failed to load resource
• ‘dx-blazor.js file is not found’ when a reverse proxy is used

Common Component Issues

• An unhandled exception on the current circuit
• Cannot pass the parameter 'X' to component 'Y' with rendermode 'InteractiveServerRenderMode'
• The type arguments cannot be inferred from the usage
• The child content element 'ChildContent' of component 'X' uses the same parameter name ('context') ...
• The component parameter 'ValueChanged' is used two or more times for this component...
• Duplicate key values in the if/else statement
• Some Blazor components features (for instance, drag and drop and column resize) do not work in my application
• Blazor components are rendered incorrectly

Grid-Related Issues

• Blazor Grid and Large/Remote Data Sources: Optimize Performance
• System.InvalidCastException: Unable to cast object of type 'DevExpress.Data.Async.Helpers.ReadonlyThreadSafeProxyForObjectFromAnotherThread'
• A property with the name XXX is not found in the object of type YYY
• The XXX enumeration type is not registered for the parse operation. Use the EnumProcessingHelper.RegisterEnum method to register the type.

Scheduler-Related Issues

• MissingMethodException

Editor-Related Issues

• System.ArgumentNullException: 'X' requires a value for the 'Expression' property

Navigation Component-Related Issues

• My iOS device does not display the Context Menu
• An infinite loop occurs in the SelectionChanged event handler

Layout Component-Related Issues

• The Form Layout renders its content incorrectly or its features do not work