Hello,
There is a bit of a strange thing happening related to the Blog that you mentioned being edited.
The Blog that you mentioned edited > when we open the edit area of it > and click anywhere, it suddenly shows the error prompt saying “The editor shows an expected error” and the console is generating the wp-includes (WordPress end) errors: https://snipboard.io/5kbavD.jpg
So, there might be some issue at the WordPress level in this regard which is why you might not be able to see the result on the Blog preview. Please first try resolving this and then check back the Blog concern again or you can also once try editing the Blog with the Page Builder editor too to confirm more about the Gutenberg editor issue.
Best Regards
.
