'Error: "I am not able to create a new namespace on our BlueSpice docu starter site (v.2.23) using Namespace Manager. We have two BlueSpice installations: one runs docu starter (2.23) and the other site runs BlueSpice free (2.22). On the BlueSpice docu starter site, I clicked on Admin > Namespace manager > Add. Entered Test as the namespace name with no options checked and clicked the button to add it. I did not receive a message stating that the namespace was created and Test didn't appear in the namespace list (even after refreshing). The same steps were successful in creating a Test namespace in our BlueSpice free site (v 2.22).
Solution: The error_log shows problems with writing to the file needed. Please verify the permissions for the config folder found in BlueSpiceFoundation, e.g. execute chmod a+w /var/www/mediawiki/extensions/BlueSpiceFoundation/config For the correct permissions for the folders needed by the apache refer to the installation manual.