Drupal 8.x

hello,

big problem.

I have a developpment site in my mac, php7, drupal 855.
All is ok.

But when i put all in my site (sgbd + site), deiban 9 and the same configuration, i have this message

Warning: preg_match(): Compilation failed: PCRE does not support \L, \l, \N{name}, \U, or \u at offset 4 in Symfony\Component\HttpFoundation\Request->getHost() (line 1303 of /var/www/vendor/symfony/http-foundation/Request.php).

Hi All,

I was just in my website uninstalling a few modules I wasn't using, when I got the following error:

The website encountered an unexpected error. Please try again later.
Error: Call to a member function getLabel() on null in Drupal\layout_builder\Plugin\Derivative\FieldBlockDeriver->getDerivativeDefinitions() (line 111 of core/modules/layout_builder/src/Plugin/Derivative/FieldBlockDeriver.php).

It's completely dead now. I can't even get into admin.

Any idea how to fix this?

Does anyone know or have recommendations on what is needed to setup web cluster installations? We are trying to get one off the group and having all sorts of issues. The main one is the connection speed between the web servers and database servers.

We have the web servers running apache on one set of servers and we have the database servers running mysql on a second set of servers.

There seems to be a constant speed bottle neck between the communication between the database servers and web servers even though they are on same network and I am seeing not tcp errors. 

I'm still trying to get used to Drupal 8 but i have a field that displays telephone numbers. When i display it it shows up at 1234567890 instead of (123)456-7890. 

Do I need to use a template hook to change the value before being displayed or do i alter the display in the field twig template?

Hello everyone,

I'm quite new to Drupal and developing a little Wizard for my company. But i do not get the number field to accept any floatingpoint values or the text field to validate, that my text is really a number.

I do know the question did not arrise the first time, but nothing i found could solve my problem.

First approach:

        $form[self::WARMMIETE] = array(
          '#type' => 'number',
            '#min' => 0,
            '#required' => TRUE,
            '#suffix' => '€',
        );

Currently i'm trying to move this block from side to bottom of add content form and i'm wondering how to achieve it. I've tried with custom sub-theme but seems like i'm not good with them and this way i was unable to do this. Anyone knows how to do this? "layout-region-node-secondary" is a block on right from form where you can define authoring information, promotion methods, etc.