OSIS-3292 Fix error url on home page
OSIS-3292 Fix error url on home page

	modified:   backoffice/urls.py

uclouvain/osis,uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/osis