Post-installation issues

[ghost]

When I try to install sandbox, everything goes perfectly until I stumbled upon this :

• When I try to clear the cache, I get this error message :

" Cannot import resource "C:\wamp\www\sandbox\vendor\sonata-project\news-bund
le/Resources/config/routing/api.xml" from "C:/wamp/www/sandbox/app/config\r
outing_api.yml". ([WARNING 1549] failed to load external entity "in_memory_
buffer" (in n/a - line 0, column 0)
[WARNING 3084] Element '{http://www.w3.org/2001/XMLSchema}import': Failed t
o locate a schema at location 'in_memory_buffer'. Skipping the import. (in
in_memory_buffer - line 9, column 0)
[ERROR 1845] Element '{http://friendsofsymfony.github.com/schema/rest}route
s': No matching global declaration available for the validation root. (in f
ile:///C:/wamp/www/sandbox/ - line 5, column 0)) "

Anyone please? :)

[rande]

see: FriendsOfSymfony/FOSRestBundle#685