Recent Topics tab not loading

I see it actually happens when I click on any of the tabs.
I can only see posts by going in to each individual section from the forum home page.

Message for Matt:

For the past 2 days or so the Recent Topics tab doesn't want to load for me. It gives me a red box with the following error:

404 - Kunena view 'forum' not found
1. an out-of-date bookmark/favourite
2. a search engine that has an out-of-date listing for this site
3. a mistyped address
4. you have no access to this page
5. The requested resource was not found.
6. An error has occurred while processing your request.

I use google chrome. I do normally access it via a bookmark but even if i click on the tab on the forum itself it gives me the same error.

I'm not sure if this is a general error with the forum at the moment or if it's just my computer being difficult. Do you have any suggestions?