Can you please provide us the site Url? So that we can see the exact issue.
Also WordPress released a new version with a new editor as a widget setting.
You can disable those features and get the standard edit setting by activating this Classic Widgets plugin. Just activate it and you will see the same settings for widgets as previous.
Tengo el mismo problema La sección de la barra lateral de la página principal no se muestra en los widgets mi sitio web es el siguiente elinformant.com