Ok, hopefully I can describe what's going on here. Everything was running perfectly on my site up until last night. The site is HERE. Now, all of a sudden, my pages aren't working. My main (static) page works just fine. And for some strange reason my "login" page is accessible. However, every other page leads anyone who clicks on them to a 324 error. I have tried a number of things including disabling plugins, updating htaccess, changing permalinks to default, changing them back, adding a plugin that is supposed to fix this problem. I can't get anywhere. This is a business website and needless to say they are in "panic mode".
Any help would be greatly appreciated, thank you