no acces to /admin urls after site migration to local wamp server After migration of my site , any url starting with /admin generate a wamp server 'reinitialization error'.
The migration has been done with drush-dump/archive-restore and is working fine when imported in a VM

what could be the cause and how can i debug it ?
Doing a 

   drush pm-update


solved the problem.

Any fine explanation why?