New Page Blogs Spinning in 5.6.1

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I am having a problem when I add new pages and go to edit them under 5.6.1

I have to select a specific page design to get the edit button to show (this happened under the 5.5). However, now I am unable to add a block. All I get is a spinning white block.

Can anyone help a non-techie continue the editing process?

 

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