Error 500 bei DB Backup installation

[captain fruit]

Hallo,

Wollte die DB Backup Erweiterung installieren dann kam Error 500. Jetzt kann ich mich nicht mehr ins Backend einloggen oder die Seite aufrufen. "Service unavailable".
Die Fehlermeldung aus der contao-manager/logs:

PHP Parse error:  syntax error, unexpected ''display_err' (T_ENCAPSED_AND_WHITESPACE) in phar:///var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/web/contao-manager.phar.php/api/HttpKernel/ApiProblemResponse.php on line 82
PHP Fatal error:  Uncaught Error: Class 'Symfony\Component\ErrorHandler\Error\FatalError' not found in phar:///var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/web/contao-manager.phar.php/vendor/symfony/error-handler/ErrorHandler.php:682
Stack trace:
#0 [internal function]: Symfony\Component\ErrorHandler\ErrorHandler::handleFatalError()
#1 {main}
  thrown in phar:///var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/web/contao-manager.phar.php/vendor/symfony/error-handler/ErrorHandler.php on line 682
[04-Jul-2022 13:45:15 Europe/Berlin] PHP Fatal error:  require(): Failed opening required '/var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/vendor/symfony/polyfill-uuid/bootstrap.php' (include_path='.:/opt/plesk/php/7.4/share/pear') in phar:///var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/web/contao-manager.phar.php/vendor/composer/composer/src/Composer/Autoload/AutoloadGenerator.php on line 1433
request.INFO: Matched route "contao_managerapi_task__invoke". {"route":"contao_managerapi_task__invoke","route_parameters":{"_route":"contao_managerapi_task__invoke","_controller":"Contao\\ManagerApi\\Controller\\TaskController"},"request_uri":"https://www.baustelle.bau-wolf.de/contao-manager.phar.php/api/task","method":"GET"} []
security.DEBUG: Checking for guard authentication credentials. {"firewall_key":"api","authenticators":3} []
 security.DEBUG: Checking support on guard authenticator. {"firewall_key":"api","authenticator":"Contao\\ManagerApi\\Security\\LoginAuthenticator"} []
security.DEBUG: Guard authenticator does not support the request. {"firewall_key":"api","authenticator":"Contao\\ManagerApi\\Security\\LoginAuthenticator"} []
 security.DEBUG: Checking support on guard authenticator. {"firewall_key":"api","authenticator":"Contao\\ManagerApi\\Security\\JwtAuthenticator"} []
security.DEBUG: Checking support on guard authenticator. {"firewall_key":"api","authenticator":"Contao\\ManagerApi\\Security\\TokenAuthenticator"} []
security.DEBUG: Guard authenticator does not support the request. {"firewall_key":"api","authenticator":"Contao\\ManagerApi\\Security\\TokenAuthenticator"} []
security.DEBUG: Calling getCredentials() on guard authenticator. {"firewall_key":"api","authenticator":"Contao\\ManagerApi\\Security\\JwtAuthenticator"} []
 security.DEBUG: Passing guard token information to the GuardAuthenticationProvider {"firewall_key":"api","authenticator":"Contao\\ManagerApi\\Security\\JwtAuthenticator"} []
security.INFO: Guard authentication successful! {"token":"[object] (Symfony\\Component\\Security\\Guard\\Token\\PostAuthenticationGuardToken: PostAuthenticationGuardToken(user=\"Seeber\", authenticated=true, roles=\"ROLE_ADMIN\"))","authenticator":"Contao\\ManagerApi\\Security\\JwtAuthenticator"} []
 security.DEBUG: Guard authenticator set no success response: request continues. {"authenticator":"Contao\\ManagerApi\\Security\\JwtAuthenticator"} []
 security.DEBUG: Remember me skipped: it is not configured for the firewall. {"authenticator":"Contao\\ManagerApi\\Security\\JwtAuthenticator"} []
tasks.INFO: Updating task status {"name":"composer/update","class":"Contao\\ManagerApi\\Task\\Packages\\UpdateTask"} []
 app.CRITICAL: Uncaught PHP Exception Symfony\Component\Debug\Exception\FatalThrowableError: "Compile Error: require(): Failed opening required '/var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/vendor/symfony/polyfill-uuid/bootstrap.php' (include_path='.:/opt/plesk/php/7.4/share/pear')" at phar:///var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/web/contao-manager.phar.php/vendor/composer/composer/src/Composer/Autoload/AutoloadGenerator.php line 1433 {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): Compile Error: require(): Failed opening required '/var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/vendor/symfony/polyfill-uuid/bootstrap.php' (include_path='.:/opt/plesk/php/7.4/share/pear') at phar:///var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/web/contao-manager.phar.php/vendor/composer/composer/src/Composer/Autoload/AutoloadGenerator.php:1433)"} []

[do_while]

Das sieht mir eher nach einem Boostrap-Fehler aus:

... Failed opening required '/var/www/vhosts/h206119.web200.dogado.net/baustelle.bau_wolf.de/vendor/symfony/polyfill-uuid/bootstrap.php' ...

[captain fruit]

Gelöst. In den Manager konnte ich mich noch einloggen und da wurde eine DB Aktualisierung verlangt. Danach ging alles wieder....