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):

Plesk auto renew (SSL It, Let's Encrypt) not working. 

• Domain DNS Manager: GoDaddy
• Webhosting: Root Server
• Website Manager: Plesk 18 Obsidian

Solution?

Problem with Drupal (after "drush cr"):

Drupa security

Found 2 security vulnerability advisories affecting 2 packages:

my_custom_module1.routing.yml

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

Code:

Convert "Western European" encoding to UTF-8 (from ISO-8859-1 / Windows-1252):

$my_detect_encoding = mb_detect_encoding($content, mb_detect_order(), false);
    
if( $my_detect_encoding != 'UTF-8'){
	$content= iconv('ISO-8859-1', 'UTF-8//TRANSLIT//IGNORE', $content);
}

Problem:

Timezone of Server/PHP/Drupal : Europe/Germany

Datetime value converted automatically to UTC + 120 Minutes (Europe/Germany). 

Solution:

Convert Datetime to UTC before saving node. 

PHP Code (modules/custom/my_module/src/Controller/MyController1.php):

CSS:

word-break: break-word;
overflow-wrap: break-word;
hyphenate-limit-chars: 15 5 5;