Drupal 8.x

Hello,

I recently started using Drupal 8 coming from previously using Drupal 7 for most of my wesbites. 

With Drupal 7 it was necessary to use sub-themes if you planned on making custom changes to a theme so that those changes would be preserved when updating the base them.

Is the same true for Drupal 8?

The Twig system is new to me and I am trying to make sure I do this right. Should I be using subthemes for the same reasons with Drupal 8 (saving custom changes)? 

I have a custom content type and want to import data of this type. Imports will happen periodically as new users join and their initial content is added. I tried using Content Import module. It seems straight-forward. It generated the csv template. I filled in a few values and tried importing. It always returns: "The website encountered an unexpected error. Please try again later."

About my site: Drupal 8, using Solr and Search API, and Permissions by Field module. The content type has title plus four fields: 

I keep getting the latest saved content displaying on the front page regardless of whether or not I turned off the settings in "content" and "content type" to show content on the front page. 

Instalé Drupal 8.5.1, no hubo ningún problema pero al momento de ingresar el usuario y contraseñas no se cuales son. ¿Dónde puedo consultar esa información?

Ya lo solucioné, no me habia fijado que drush me proporciona el usuario y contraseña.

Hi,

I'm having the following error when trying to intall or uninstall a module since upgrade 8.5.1

Do someone else having same issue ?

Fatal error: require(): Failed opening required '/srv/bindings/1c1195afa0e44f85803b55e4dda14d9e/code/vendor/composer/../../web/core/lib/Drupal/Core/Layout/Icon/SvgIconBuilder.php' (include_path='.:/usr/share/pear:/usr/share/php') in /srv/bindings/1c1195afa0e44f85803b55e4dda14d9e/code/vendor/symfony/class-loader/ApcClassLoader.php on line 112 

Context :

HI

I have a site with a content type that has quite a few fields in addition to the title, body and image.

I want to add additional HTML Text fields (5 in fact) which are contained within a small section of the page in tabs. E.g. ON the right would be 5 tabs which are links that when clicked changes the content below to the relevant content.

On the left though will be the standard Title, body etc.

Is there a d8 module please that would allow me to add this to a content type?