Steps to reproduce the issue
- Clone Joomla 4.2-dev branch (start composer install and npm ci).
- Start the installation and fill out all datas.
- Finish the installation.
Expected result
Joomla ist installed and You can call the frontend and the backend
Actual result
Installation could not be finished.
System information (as much as possible)
There is an error message in the browser console:

Additional comments
Addressed at @laoneo in Mattermost https://joomlacommunity.cloud.mattermost.com/main/pl/1jtaekzscfr1jdfmpuog5sqnsa