Sorry, I can’t see where to start a new thread. So I’ll try this. After waiting until today to install Gutenberg update, I now can’t use Preview (StudioPress Genesis Sample theme). It’s not working at all. I live in Preview, to update many pages throughout our association season. I tried installing the Health Check plugin, but that didn’t work to show any issues. I will reinstall the old editor until this problem is resolved, as I see many problems here and on the web with Preview not working. For the record, this little bug is super annoying and time consuming. Gutenberg looks exciting; I guess I’ll have to wait.