Tried but doesnt solv the prblem, and for the errors there was no 404 error in the access log file :( when i run these commands i get : This will overwrite existing files ! ..... ... Compressing done Compressed 7 block from 3 template for 3 context

So ok could you please check this :

in the file /etc/apache2/conf-enabled/openstack-dashboard.conf :

Check that the Alias /static and Alias /horizon/static point to a directory that exists and contains those sub-directories:

app auth dashboard framework horizon js scss themes

the uncommented Alias /static and Alias /horizon/static werent pointing to those directories, so i checked the commented Alias /static and Alias /horizon/static and they were pointing to those directories. After uncommenting and reloading the apache2 service nothing changed :(

2' tips:

1- your static-dir (ie /usr/share/openstack-dashboard/openstack_dashboard/static/ ) must finish with an end '/'

2 - you need to check also that static-dir is authorized in the openstack-dashboard.conf :

<Directory static-dir > 

  Require all granted

</Directory>

Thank you Laurent_bcn, the ubuntu theme has chown up for the first time !! This is the right answer