Drupal

Problem:

composer.json:

"conflict": {
        "drupal/drupal": "*"
    },

What is the meaning of "conflict" in composer.json?

Solution:

Problem:

I have a node, and webform as reference and email handler for submissions. 

One of the field "city" is not required and is sometimes empty. If city is empty I see this text instead of nothing. 

[webform_submission:node:city:value]

A temp solution:

[webform_submission:node:city:clear]

Is there a better solution?

Problem:

Problem:

AH01071: Got error 'PHP message: Uncaught PHP Exception GuzzleHttp\\Exception\\ConnectException: "cURL error 28: Failed to connect to myserver.example.com port 8090: Connection timed out

Solution?

Problem (Drupal Status Report) "/admin/reports/status":

Transaction isolation level
REPEATABLE-READ
The recommended level for Drupal is "READ COMMITTED". 
See the setting MySQL transaction isolation level page for more information.

Solution (in sites/default/settings.php):

my_custom_module1.routing.yml

Solution 1 (low level security: at least one of roles required):

Problem:

Problem: