Admin Pages Not Showing Up

Forgive the reposting a similar issue.

Basically, when I go to the Admin section, no pages are displaying or are showing up.

When logging in to Admin, I see all the menu choices on the left side, but when I click on any of them, no page is displayed on the right side.

This includes Posts, Media, Links, Pages, etc. When I click on “Post” for example, no page content is display on the right.

I’ve cleared cache and have no problem accessing my other WordPress site’s admin section.

Its been about two months since I’ve logged in–perhaps this is due to a PHP update? Any thoughts on how to get back access to be able to make updates and posts would be extremely helpful.

Thanks! Steve