I have only played on your server, and last time before today was maybe 1.5 weeks ago.
When you say download a fresh copy, do you mean of the game in total or just the affected files? If it's just the affected files, how do I do that?
Also, thank you for the quick response =)

Hello. While playing today my game kept crashing while trying to load Stormwind. This is the report that I was given, unfortunately I had to remove some of it since the report exceeded the character limit. But I'm guessing the information you really need is at the start where the failures are stated...