I am attempting to change the background image and / or color of my blog, currently using the Superhero theme. None of the changes appear to stick. I go to Themes, Customize, Background, select my image, upload it, and hit save...and on the sidebar the theme seems stuck on "saving" in perpetuity. When I load the blog in a separate tab, there is no change to the background image. Same problem attempting to change the BG color.
The blog I need help with is cennwyn.wordpress.com.