I got this problem in odoo 8 after i was trying to add new module to the Addons folder>>please help!

content for /web_calendar/static/src/css/web_fullcalendar.css defined in bundle  'web_assets_backend'

content for /web_calendar/static/lib/fullcalendar/css/web_fullcalendar.css defined in bundle  'web_assets_backend'

content for /web_diagram/static/src/css/base_diagram.css defined in bundle  'web_assets_backend'

content for /web_gantt/static/src/css/gantt.css defined in bundle  'web_assets_backend'

content for /web_calendar/static/lib/dhtmlxGantt/codebase/ dhtmlxGantt .css defined in bundle  'web_assets_backend'

content for /web_graph/static/src/css/graph.css defined in bundle  'web_assets_backend'

content for /web_graph/static/src/css/nv.css defined in bundle  'web_assets_backend'

content for /web_kanban/static/src/css/kanban.css defined in bundle  'web_assets_backend'

content for /web_tests/static/src/css/web_tests.css defined in bundle  'web_assets_backend'

content for /web_view_editor/static/src/css/view_editor.css defined in bundle  'web_assets_backend'

Nothing appeared except the menu bar.

Thanx