SiteOrigin Custom CSS Visual Icon is appearing blank

Good afternoon,

I’m having some trouble with the visual icon in the Custom CSS plugin. Whenever I click on the icon, the next screen shows up as a blank white screen. This is happening on all of my sites at the moment. I’ve tried the plugin test (deactivating all of them, then reactivating), increasing memory size, contacting my host, but nothing seems to fix this problem. Could someone please help me solve this issue asap? If necessary, I can provide temporary admin credentials.