I am suddenly unable to perform editing functions after updating my theme. When I try and add a gallery to a post, or open a plugin or perform a few other functions I get a dark grey, transparent screen with a circle of spinning white dots which then stop and the screen freezes. I’ve been searching for solutions on the internet, have tried different browsers, but so far no luck. I have read posts that indicate it might be something to do with the theme itself. Has anyone had this issue or found a resolution for it? I am not a techie, and would be so grateful for any feedback explained simply. Thank you so much!!