Drupal 8.x

I inadvertently installed the core search module when I already had the search api installed and now I have errors. I don't know if Search is the real problem but I need to uninstall modules to find what is causing the problem. The page, /admin/modules/uninstall, returns HTTP ERROR 500. It's a pretty white screen with ugly text, I think this is called, WSOD? <I tease. Laughing keeps me from screaming.>

I have a multilingual site that is also using the language hierarchy module so that certain languages inherit their content from other languages without needing to be expressly translated. This is all working great except for one thing. Internal links in the content always end up going to the default English version no matter what. It even puts the “en” language code in the URL.

I am experiencing serious trouble with my site. After a failed update and failed recovery attempts, I have been seeing various core errors (according to which attempt, they were different, but all were related somehow to core, if I interpret the error message correctly).

The current error is: ""Fatal error: Interface 'Drupal\Component\Plugin\Discovery\DiscoveryInterface' not found in /web/htdocs/www.mysite.org/home/core/lib/Drupal/Component/Plugin/PluginManagerInterface.php on line 28"

Hello! I do not use LanguageSelect and Dropdown Language  cause they use Javascript and jquery. I wish my site works quickly. I need simple html select list with flags (I know it is possible with css) with no any js.

Have you a code for displaying language switcher block as select list for Drupal 8 ?

Hello! I do not use RealName module cause I need lightweight fast working code. Here it is an example of replacing user login in Submitted string and everywhere on a site: user profile, views and even in the admin pages - with user's name that he places in field_imya- this is Russian word name. Or if user had not filled this field replace with line User id

This is driving me nuts. Any help greatly appreciated!

I have a view with a contextual filter of type Content datasource: ID

When the value is NOT in the URL, I provide the following fixed value: ?search=

It is a page display with a path of /search

A typical query string is "/search?search=venice"

I am trying to replicate this query string in the View Preview

The instructions in the View Preview are: "Separate contextual filter values with a "/". For example, 40/12/10."

How do I modify "?search=venice" to fit into "40/12/10"?