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Upgrade: "The type initializer for 'Telerik.Sitefinity.Localization.Res' threw an exception."

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TitleUpgrade: "The type initializer for 'Telerik.Sitefinity.Localization.Res' threw an exception."
URL Nameupgrade-the-type-initializer-for-telerik-sitefinity-localization-res-threw-an-exception
Article Number000179880
EnvironmentProduct: Sitefinity
Version: 8.x, 9.x
OS: All supported OS versions
Database: All supported Microsoft SQL Server versions
Question/Problem Description
Runtime error after upgrade on initialization (startup) screen:
"The type initializer for 'Telerik.Sitefinity.Localization.Res' threw an exception." 
Steps to Reproduce
Clarifying Information
Error MessageThe type initializer for 'Telerik.Sitefinity.Localization.Res' threw an exception.
Defect Number
Enhancement Number
This is caused by the App_Data folder being readonly or missing assemblies in the Bin folder.
Option 1
  • Make the App_Data folder of the project not ready only - uncheck the Read-only property and apply changes to this folder, subfolders and to all files in it.
  • Restart the project
Option 2
  • Copy all the assemblies from _EmptyProject/Bin folder and paste them in your project's Bin folder
  • Restart the application, which should trigger the upgrade.
Option 3
If the version of Newtonsoft.Json.DLL is older than the version from Sitefinity's _EmptyProject:
  • In Visual Studio, open the Package Manager Console
  • Type "Update-Package Newtonsoft.json -version 9.0.1"
  • Save and rebuild the project
  • Copy the DLLs from the _EmptyProject folder to the project's bin folder
  • Resolve any assembly version mismatch
A blank space in the beginning of a configuration file could also trigger this exception. E.g:
<?xml version="1.0" encoding="utf-8"?>

In the above markup the space character will be located in the very beginning of the file, before the < character
Last Modified Date5/2/2017 7:37 PM
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