diarylove80 I often get this issue when edit a page using block editor ( no issue with classic editor). I did google to find a solution and they said I need update Nginx rules as follow: location / { try_files $uri $uri/ /index.php$is_args$args; } Does anyone get same issue and manage to fix it? Ref: https://wordpress.stackexchange.com/questions/324539/how-to-fix-the-editor-has-encountered-an-unexpected-error
marty WO uses that exact code as standard, e.g. see /etc/nginx/common/php74.conf It's more likely a plugin or theme conflict. You can try disabling them one at a time to see if you can narrow down the cause.