I am getting an error when I click on the updates tab. the error that I get is

The packages cannot be loaded. View details

When I click view details links, I see the below error message :

An error occurred when trying to create a controller of type PackageManagementController. Make sure that the controller has a parameterless public constructor.

enter image description here

Can someone please help?

  • What is your Sitecore version and is there any error in log? Dec 11, 2019 at 5:44

2 Answers 2


Make sure you have the following in the ConnectionStrings.config

<add name="PackageManagementServiceUrl" connectionString="https://updatecenter.cloud.sitecore.net/"/>

You can find more information here: https://doc.sitecore.com/developers/90/platform-administration-and-architecture/en/the-update-center.html


If you have version 9.0.2 - 9.1.1, maybe, you need to update Sitecore Update Installation Wizard. You can find the package on https://dev.sitecore.net/Downloads/Sitecore_Experience_Platform/91/Sitecore_Experience_Platform_91_Update1.aspx

For 9.0.2: Sitecore Update Installation Wizard for 8.x-9.0

For 9.1 and 9.1.1: Sitecore Update Installation Wizard for 9.1

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