Welcome to my first blog of 2021! Its been a crazy year so far, but glad to be back writing. This issue is one that has been bothering me for some time in my vSphere 7 environment. Every time I logged into the vSphere Client i got the following error. “Error downloading plug-in. Make sure that the URL is reachable and the registered thumbprint is correct.” I finally had a few moments to research the issue and resolve it.