| Q | A | ---------------- | ----- | Bug report? | yes | Feature request? | no | BC Break report? | no | RFC? | no | Symfony version | 3.3@dev I'm using symfony/flex with sf 3.3.6 with symfony/config `^3.3@dev` (because of https://github.com/symfony/symfony/issues/23753) After clearing cache (without warmup) I get this exception:  After reloading everything is fine.