This change causes error page for this http://localhost:8081/content/roups/foo request to have content like:
```
Repository kind 'roups' not exists
```
Note that the "g" is missing from "groups". The `explodedPath[0]' in this case is not missing (that would lead to another error), but it's value cannot be interpreted. Is not any of "known" values like 'groups', 'repositories', 'sites' or so (an extensible list, core providing "groups" and "repositories"..).

Hence, the "missing from path..." is inappropriate IMO. The message here is rather "I don't know what 'roups' is" :)