Can't view or edit any page of my application in Radzen IDE: "Assignment to constant variable." error popup

This started after merging two branches.

  • Visual Studio shows 0 errors, 0 warnings, and is able to launch the application in IIS.
  • Each page works correctly with no errors in Chrome's dev console.
  • I am unable to view or edit any page of this application in Radzen.
  • I see no information in log.txt except for the same error that shows in the UI.

If you have Radzen subscription you can zip and send us your application meta folder at to check locally what’s going on.

The problem was with the Main layout. Not sure exactly what, but recreating the layout fixed the issue.

The issue was caused by leading Unicode BOM character in your main layout json file.

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