TYPO3 Core

According to the error message its

open_basedir = /var/www/clients/client3/web566/web:/var/www/clients/client3/web566/private:/var/www/clients/client3/web566/tmp:/var/www/xxxxxdomainxxxxx.com/web:/srv/www/xxxxxdomainxxxxx.com/web:/usr/share/php5:/usr/share/php:/tmp:/usr/share/phpmyadmin:/etc/phpmyadmin:/var/lib/phpmyadmin:/dev/random:/dev/urandom:/var/www/typo3

The question is why

/var/www/clients/client3/web566/web/typo3conf/ext/typo3_console/Libraries/symfony-process.phar/vendor/autoload.php

which is the resolved path for

phar:///var/www/clients/client3/web566/web/typo3conf/ext/typo3_console/Resources/Private/ExtensionArtifacts/../../../Libraries/symfony-process.phar/vendor/autoload.php

is not part of

/var/www/clients/client3/web566/web

After updating to latest 7.6.30 I experienced those fatals.
phpunit Extension in version 5.3.5 installed.

Warning: Uncaught TYPO3\CMS\Core\IO\PharStreamWrapperException: Executing phar:///var/www/xxxxxxx.de/webroot/htdocs/typo3conf/ext/phpunit/Resources/Private/Libraries/phpunit-library.phar/bootstrap.php is denied in /var/www/xxxxxxx.de/webroot/vendor/typo3/cms/typo3/sysext/core/Classes/IO/PharStreamWrapper.php:486
Stack trace:
#0 /var/www/xxxxxxx.de/webroot/vendor/typo3/cms/typo3/sysext/core/Classes/IO/PharStreamWrapper.php(238): TYPO3\CMS\Core\IO\PharStreamWrapper->assertPath('phar:///var/www...')
#1 /var/www/xxxxxxx.de/webroot/htdocs/typo3conf/ext/phpunit/Resources/Private/Libraries/phpunit-library.phar(12): TYPO3\CMS\Core\IO\PharStreamWrapper->stream_open('phar:///var/www...', 'rb', 129, NULL)
#2 /var/www/xxxxxxx.de/webroot/htdocs/typo3conf/ext/phpunit/Resources/Private/Libraries/phpunit-library.phar(12): require()
#3 /var/www/xxxxxxx.de/webroot/htdocs/typo3conf/ext/phpunit/ext_localconf.php(5): require_once('/var/www/leipzi...')
#4 /var/www/xxxxxxx.de/webroot/vendor/typo3/cms/typo3/sysext/core/Classes/Utility/Exten in /var/www/xxxxxxx.de/webroot/vendor/typo3/cms/typo3/sysext/core/Classes/IO/PharStreamWrapper.php on line 486

Fatal error: TYPO3\CMS\Core\Utility\ExtensionManagementUtility::main(): Failed opening required 'phar:///var/www/xxxxxxx.de/webroot/htdocs/typo3conf/ext/phpunit/Resources/Private/Libraries/phpunit-library.phar/bootstrap.php' (include_path='/var/www/xxxxxxx.de/webroot/vendor/pear/http_request2:/var/www/xxxxxxx.de/webroot/vendor/pear/pear_exception:/var/www/xxxxxxx.de/webroot/vendor/pear/net_url2:.:/usr/share/php') in /var/www/xxxxxxx.de/webroot/htdocs/typo3conf/ext/phpunit/Resources/Private/Libraries/phpunit-library.phar on line 12

The »System Environment« (Install Tool) shows:
open_basedir = /var/www/clients/client3/web566/web:/var/www/clients/client3/web566/private:/var/www/clients/client3/web566/tmp:/var/www/xxxdomainxxx.com/web:/srv/www/xxxdomainxxx.com/web:/usr/share/php5:/usr/share/php:/tmp:/usr/share/phpmyadmin:/etc/phpmyadmin:/var/lib/phpmyadmin:/dev/random:/dev/urandom

I have contacted the server administrator first and he wrote:
»"symphony.phar" is a file ... and not a folder... Something else seems to be wrong.«

But I can't really do anything with it.

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/57587

Patch set 1 for branch TYPO3_8-7 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/57595

Patch set 1 for branch TYPO3_7-6 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/57596