After investigations, commit the proposed patch by kklimonda presented with the
following introduction :
cm/templates/site/login_form.html template uses a relative url for the form action, which seems to break deployment in the subfolder when trailing slash is missing (the form redirects to the upper folder breaking login). Using {% url login %} (as in the attached patch) instead would fix the issue.
{% load i18n %}{% autoescape off %}{% block content %}{% endblock %}
{% blocktrans with SITE_URL as SITE_URL and notification.desactivate_notification_url as desactivate_notification_url %}If you'd like to unsubscribe from this notification, click the following link: {{ SITE_URL }}{{ desactivate_notification_url }}.{% endblocktrans %}
--
{{ CONF.workspace_name }}
{{ CONF.site_url }}
{% endautoescape %}