Correcting error - ClassNotFoundException: Attempted to load class "Forbidden"

Correcting error - ClassNotFoundException: Attempted to load class "Forbidden" from namespace "Symfony\Component\HttpKernel\Exception”.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| Refs tickets  |
| License       | MIT
| Doc PR        |