I am getting the following error when trying to build my contest: Contest "statements.ftl" doesn't contain '\usepackage {xparse}', but problem X does.

Has someone already encountered such an issue? I have no idea why this is happening, because it is a very standard statement, written in Portuguese.

I have other problems and they seem to work just fine. I even tried to delete the statement and re-write but the issue persisted even for a blank statement!

I would appreciate any help, thanks!