I had to manually copy these directories into my ejabberd setup in /usr/share/erlang/lib/ejabberd-18.09/priv to have properly rendered css styles in the http admin interface. Shouldn't these directories be included in the rpm package ?
https://src.fedoraproject.org/rpms/ejabberd/c/5a46a66a933229443a6ba33da86863c7621772eb?branch=master
This is fixed in Fedora 28 by https://bodhi.fedoraproject.org/updates/FEDORA-2018-1da98b74da and Fedora 29 by https://bodhi.fedoraproject.org/updates/FEDORA-2018-7e1d271343
ejabberd-18.09-3.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-7e1d271343
ejabberd-18.04-2.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.
ejabberd-18.09-3.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.