horizon doesn't find template file

[drico]

Hello,
I just installed the ubuntu package
ii python-manila-ui 2.1.0-1
on an existing install of openstack with ubuntu 16

dashboard version :
ii openstack-dashboard 3:10.0.0-0ubuntu1~cloud0

and restarted apache + memcached

Now after login on horizon I get :
[Wed May 24 18:55:21.566062 2017] [wsgi:error] [pid 8841:tid 140090409563904] Internal Server Error: /horizon/project/
[Wed May 24 18:55:21.566104 2017] [wsgi:error] [pid 8841:tid 140090409563904] Traceback (most recent call last):
[Wed May 24 18:55:21.566111 2017] [wsgi:error] [pid 8841:tid 140090409563904] File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 164, in get_response
[Wed May 24 18:55:21.566118 2017] [wsgi:error] [pid 8841:tid 140090409563904] response = response.render()
[Wed May 24 18:55:21.566127 2017] [wsgi:error] [pid 8841:tid 140090409563904] File "/usr/lib/python2.7/dist-packages/django/template/response.py", line 158, in render
[Wed May 24 18:55:21.566136 2017] [wsgi:error] [pid 8841:tid 140090409563904] self.content = self.rendered_content
[Wed May 24 18:55:21.566144 2017] [wsgi:error] [pid 8841:tid 140090409563904] File "/usr/lib/python2.7/dist-packages/django/template/response.py", line 133, in rendered_content
[Wed May 24 18:55:21.566153 2017] [wsgi:error] [pid 8841:tid 140090409563904] template = self._resolve_template(self.template_name)
[Wed May 24 18:55:21.566162 2017] [wsgi:error] [pid 8841:tid 140090409563904] File "/usr/lib/python2.7/dist-packages/django/template/response.py", line 88, in _resolve_template
[Wed May 24 18:55:21.566171 2017] [wsgi:error] [pid 8841:tid 140090409563904] new_template = self.resolve_template(template)
[Wed May 24 18:55:21.566179 2017] [wsgi:error] [pid 8841:tid 140090409563904] File "/usr/lib/python2.7/dist-packages/django/template/response.py", line 80, in resolve_template
[Wed May 24 18:55:21.566188 2017] [wsgi:error] [pid 8841:tid 140090409563904] return loader.get_template(template, using=self.using)
[Wed May 24 18:55:21.566197 2017] [wsgi:error] [pid 8841:tid 140090409563904] File "/usr/lib/python2.7/dist-packages/django/template/loader.py", line 46, in get_template
[Wed May 24 18:55:21.566206 2017] [wsgi:error] [pid 8841:tid 140090409563904] raise TemplateDoesNotExist(template_name)
[Wed May 24 18:55:21.566213 2017] [wsgi:error] [pid 8841:tid 140090409563904] TemplateDoesNotExist: usage.html

Any help would be truly appreciated

[drico (cp-ows)]

The bug is coming from a mishandling in
http://ubuntu-cloud.archive.canonical.com/ubuntu xenial-updates/newton

the python-manila-ui is not available there for newton, only for ocata at the moment of writing.
So it installed the one from the default ubuntu repository that is not compatible.
you need to install 2.5.1 if you bump in that issue