Getting a more descriptive error message from my instance

Hi Robert,
I’m not using the command line but I upgraded through the site upgrade page. I’ve added a comment into my post.

I also feel a slight duty to test the site upgrade page and report errors. Though at this point in time I’d rather get my site back up and running so I will use a command line.

How do I do the suggestion above? The upgrade was last week through the browser.