Rudder

As of 4.1 documentation, the "Basic Administration" -> "Archiving" -> "Importing configuration" states:

If necessary, correct all files permissions: chown -R root:rudder directives groups parameters ruleCategories rules techniques

However, this is not completely correct, since the NCF Editor requires not root but the ncf-api-venv user to have write permissions.

So either this an additionally required correct command:

chown -R ncf-api-venv:rudder ncf/50_techniques techniques/ncf_techniques/

Or you'd need to give the rudder g+w to all files, since the user is member of the rudder group.