I installed Tuleap and everything is working perfectly.

I then decide to install mediawiki plugin.

I install it as specified in the documentation: https://docs.tuleap.org/installation-guide/install-plugins.html

I activate it in the administration page, and in my project services and have an error.

After investigation, the plugin_mediawiki database cannot be created. So I run the setup.el7.sh with --configure option (as it is supposed to configure plugins and for mediawiki add the missing database permissions), but it seems to be useless, as the permission is never added.