So I'm setting up a sylius project using docker and am getting an error when I first tried to load the page. The docker set up on sylius website didn't seem to work so I made my own docker files and can successfully start the docker containers. The error is below:

```
An exception has been thrown during the rendering of a template ("Cannot find name for "en_UK" locale code").

```

During the installation, sylius asks whether you want en\_US or something different so I typed en\_UK, presuming that was the notation required. Upon setup completion, I tried to load root page and I get the error message above. However, strangely, on the symfony toolbar on the error page it says US web store. 

If anyone could help at all it would be greatly appreciated. Thank you in advance.