Drupal 8.x

I want to change the date format of the fullcalendar. the default date was the drupal default date. I tried to change date format of "start date" field in view  to (F j,Y | H:i) but the popup in calendar still show the default date format.

I want to change hreflang="en" to hreflang="ro" globally?

How can I do this in using mycustomtheme.theme.THEME file?

I've created several custom modules in D8 but this one is busting me. At first I thought it was because I was invoking a path of '/admin/structure/site_mgr' and created a RouteSubscriber to ensure it was added to the collection. To troubleshoot this further, I changed the path to 'foo/site_mgr', and tried combinations of adding '_admin_route: TRUE', destroying my reference to my RouteSubscriber, destroying my RouteSubscriber just to eliminate possible variables, running cache rebuild at each step. I verified my YAML passes linting.

Hello,

I just moved a drupal site on my local machine for dedvelopoment purrposes and I get the following meassage.

"Drupal is already installed".

I tries some available options like update, or see your current site but I still get this message.

I don't know where to look for correcting this problem.

Any help is appreciated.

Thank you,

Crhistofororos

I am charged with updating two Drupal 8.6.14 sites to current 8.8.4. The sites were not installed with Drush so I am working manually. They both have a handful of moduels that need updating, which I planned to do first:

When I use the Extend admin UI to download the current module versions, I get this message:

I was testing if I can upgrade my site from D7 to D8. Post upgrade everything looks good except one hiccup. All my existing node's text format cannot be changed manually there for unchanged node's body does not show any text. If I change it manually however to full html everything works fine. My problem is I have 10000+ nodes and it's impossible for me to open each an everyone and changing the text format. How do I set text format without doing it manually?