vSphere Client Plug-In Scripts Fail with No Error Message

When you run the scripts to install or upgrade the vSphere Integrated Containers plug-in for the vSphere Client, the operation fails immediately.

Problem

Running the install, uninstall, or upgrade scripts fails immediately after you enter the password for vCenter Server. The output of the script is Error! Could not register plugin with vCenter Server. Please see the message above. However, there is no error message above.

Cause

You have set the VIC_MACHINE_THUMBPRINT environment variable on the system on which you are running the script. The presence of the VIC_MACHINE_THUMBPRINT environment variable causes the script to skip the verification of the vCenter Server certificate thumbprint. This causes the script to fail.

Solution

Delete the VIC_MACHINE_THUMBPRINT environment variable, or run the script on a different system.