You need to reregister a previously registered plug-in package with your vCenter Server when certificate has been regenerated during the upgrade or migration process.

You can unregister the solution in the following way:

1

In a Web browser, navigate to the Managed Object Browser of your vCenter Server.

https://<vcenter_server_ip_address_or_fqdn>/mob/?moid=ExtensionManager

2

Log in with your vCenter Server credentials.

3

On the ManagedObjectReference:ExtensionManager page, under Methods, click UnregisterExtension.

4

On the void UnregisterExtension page, in the text box inside the Value column, enter the value for the key property of the Extension data object of your vSphere Web Client extension.

5

Click Invoke Method to unregister the extension.

Go to the solution registration page and register.