"Session expired. Please log in again. You will not move away from this page."

I’m getting this message in Appearance –> Customizer: “Session expired. Please log in again. You will not move away from this page.” and getting kicked out. I then log in, and get kicked out again.

Here’s the sequence of events:
-I built site in a sub directory
-successfully moved to main directory using the PHP file change
– then icon Images didn’t show up from the Enfold theme. I added this text to .htaccess file as instructed on this forum: Header set Access-Control-Allow-Origin “*”, it worked, all theme icons magically appeared again. Yippie. All good.
-But now the wp dashboard is working ok, except when I go to Appearance –> Customizer screen. At this point, “You are Customizing”, “Site Title & Tagline”, “Navigation”, and “Static Front Page” all appear, but “Widgets” doesn’t and that’s when I get thrown off. If I close Customizer with the top left “x” I’m back in the main WP admin dashboard/developer area, whatever it is called. Note: I was able to make some changes going directly to Widgets via the Widget selection under Appearance on the side menu area.

That’s the first thing I need to fix, and even more so now because this morning when I installed WooCommerce it threw off my entire footer column widgets.