Drupal 8.x

I've installed the Opigno Drupal distribution via Acquia's "Install Distribution" option and everything seems to be working fine... mostly.

We need to install a contrib module and this caused a number of issues. The Opigno distro comes with an Opigno profile that contains all of the necessary modules. These solely exist in libraries/opigno_lms/modules.

Hello,

I am trying to  understand the field uid in the table file_managed. Looking at the database, the filed has the "The ID of the target entity." detail.

I have created one of my own contents type. Every file I upload it has  and this uid has only value of 1.  I could not find any other logical explanation except this other than reference to content type because it has value of 1.

Please someone clarify this if I am wrong. 

Thanks

As preparation for Drupal 9 I am trying to move onto Composer and am installing the Upgrade Status module:

https://www.drupal.org/project/upgrade_status

using the composer commands provided.  All commands run through without complaint but when I check /admin/reports there is no sign of an Upgrade Status report.  Am I missing something or is there a way to check if composer has actually installed the module?

Thanks

I'm using module "Commerce Ajax Add to Cart" create button Add to Cart on Detail Product. But when I click "Add to Cart", It got a error 
"[Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/"
 This is a link error.

 I'm a new Drupal developer and this is my first time writing test for an existing module created by another developer. I am using the WebDriverTestBase with chromedriver. When running the test, the main page does load out in the chromedriver browser. However, when the code below runs, it says Page Not Found. 

In old Drupal versions 4,5,6,7, node preview was like any other page. (And my users are used to that style.). In Drupal 8/9 the node preview is JavaScript-ajax style, in a popup widget.

I was curious, if it was still possible to go back to old style of node preview, or this new style is mandatory?

Please let me know how to switch back. My users will be happy.

(actually on this Forum itself, the preview seems to be old style page in yellow color page coming from backend ... not the popup one on th e client side.........how is it done?)

Thanks