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Error install introduction package with existing tree #84

@jacques2017

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@jacques2017

Hi,
my side get an update vom TYPO3 V8 with bsdist to 11.5.22
Update with deactivate all old extensions.
Now I want to install the introduction package, but I get an error:

503
Oops, an error occurred!

Argument 3 passed to TYPO3\CMS\Core\DataHandling\DataHandler::addDefaultPermittedLanguageIfNotSet() must be of the type int, null given, called in /var/www/clients/client153/web1317/web/typo3_src-11.5.22/typo3/sysext/core/Classes/DataHandling/DataHandler.php on line 944

the extensions bootstrap-package and introduction are installed, but I have no new page-tree.

How can I install the introduction-package without error and with new page-tree

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