Drupal 8.x

Trying to find a simple way to add via hook possibly within mymodulename_search_api_solr_search_results_alter to hide a specific site page from internal search results. I'm finding suggestions for modules but is there a simpler way to hide a page?

I have created a new image style having a full width of 870px for article content type. However, the images are still not showing up for the full width of the right size as you can see on the following page. Could anyone please let me know what I am missing and how should I fix the issue so that the images can start showing for the full width of the content on the right size?

https://japaneseautoworld.com/news/why-should-you-use-paint-protection-f...

I do not know whats the first issue to solve. (core update is also not working)
So I will try to start to resolve this problem first to get a system without error befor upgrading:

One error is whe I try to clear the cache (drush cr) or   drush cache-clear -> 3 (router)
I  get this error (poll is available but I am not able to enable poll :

Hi

Im trying to import articles via the module "Content Import". It work well for fields: title, langcode, body, content.

There is no nice description for the field_image. In the module description they write just this: "For Image type field, upload your images to /images folder and mention the image name in the column". 

For the filed_tags the description is completly missing.

So my qestions are:

Where to but the images while importing?

What format must tags have?

Cheers

Drupal 8

Private Message module does not work properly.

If Admin sends a message to a User then the User does not receive this message.

If the User sends a message to the Admin then the Admin does not receive this message.

Permission "Use private messaging system" was activated in /admin/people/permissions for AUTHENTICATED USER.

Pls tell me what is wrong with me.

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I Have installed the Private files download permission module https://www.drupal.org/project/private_files_download_permission

but when trying to uninstall it crashed the site and probably did not updated configuration. Now I can't access my nodes as it displays errors below.

How can I fix this please?