Failed opening required" symfony/class-loader/ApcClassLoader.php on line 110 I get this error after installing a module in modules/contrib and then uninstalling and moving it to a different directory. I accidentally installed the module in the wrong place.

This is in a local BLT/Drupal-VM environment. I've tried drush cr and rebuilding the drupal core directory as well as nuking the vendor folder that composer installs. 

Seems that the paths to the installed modules gets stored in PHP memory some how and after the move php is not picking up the changes. 

Restarting apache doesn't do anything either.
Restarting php from within the VM seems to have done the trick. 

sudo service php5.6-fpm restart