upgrade editor to gutenberg

I've an issue after upgrading my wordpress site to new version 5.

The error is about the default editor on wordpress 5 'gutenberg' and I can't edit all post on my site.

Below error details:

```
TypeError: Cannot read property 'show_ui' of undefined
at https://site.com/wp-includes/js/dist/editor.min.js?ver=9.0.4:55:239972
at i (https://site.com/wp-includes/js/dist/vendor/lodash.min.js?ver=4.17.11:6:91)
at An.filter (https://site.com/wp-includes/js/dist/vendor/lodash.min.js?ver=4.17.11:99:338)
at https://site.com/wp-includes/js/dist/editor.min.js?ver=9.0.4:55:239937
at ph (https://site.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.6.3:97:88)
at eg (https://site.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.6.3:125:307)
at fg (https://site.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.6.3:126:168)
at wc (https://site.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.6.3:138:237)
at fa (https://site.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.6.3:137:115)
at gg (https://site.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.6.3:135:196)
```

My system Information
- [ ] ee version: EasyEngine v3.8.1
- [ ] ubuntu 18.04 server
- [ ] php7 enabled

Solved:

solve the issue by updating nginx confiugration.

```
cd /etc/nginx/common/
vim wpsc-php7.conf
```

Updating the configuration below.

```
location / {
# If we add index.php?$args its break WooCommerce like plugins
# Ref: #330

# Old Config
# try_files /wp-content/cache/supercache/$http_host/$cache_uri/index.html $uri $uri/ /index.php;

# New Config
try_files /wp-content/cache/supercache/$http_host/$cache_uri/index.html $uri $uri/ /index.php?$args;
}
```

Thanks.

Inizia con /etc/nginx/common/wpsc-php7.conf e confronta il blocco location segnalato con la configurazione corrente. Verifica se il passaggio degli argomenti della query consente la modifica in Gutenberg senza compromettere WooCommerce, quindi documenta o convalida la configurazione risultante.

Scritto dal modello di indicizzazione a partire dal testo della issue.