Cannot see blocks in homepage

Hi,   I wanted to swap out a picture on my homepage. When I went to edit it, there was nothing in the editor. The page loads fine and other pages in the editor load fine. My first thought was to rollback the WordPress version, but it says the theme is compatible. I have tried disabling all plugins. Any advice? The page is lownote.net. I can take screenshots or create an admin credential for you to look at things.