How do I get my Blocks to Open For Editing?

Hi- I am inside my admin “blocks” section and my blocks won’t open for editing. I think they use to open in the past. Only the central block is available to edit. Is there something I need to do open the other blocks? When I click on the plus sign to open, the thing pops up on the top of my screen saying loading to position, but doesn’t open. I would appreciate any help you could provide.

Kindest Regards

AlmondJJoy :slight_smile: