Fehlermeldung

• Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/includes/file.phar.inc).
• Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/includes/file.phar.inc).
• Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/includes/file.phar.inc).
• Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/includes/file.phar.inc).
• Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 304 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/sites/default/settings.php).
• Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 305 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/sites/default/settings.php).
• Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 313 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/sites/default/settings.php).
• Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 320 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/sites/default/settings.php).
• Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_settings_initialize() (line 826 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/includes/bootstrap.inc).
• Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_settings_initialize() (line 835 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/includes/bootstrap.inc).
• Warning: session_name(): Session name cannot be changed after headers have already been sent in drupal_settings_initialize() (line 838 of /is/htdocs/wp1172275_OZONHTKT1A/www/jstraining/includes/bootstrap.inc).