Everything was working normally on my site, until now- all of a sudden, when trying to access
the site, I get a 403 forbidden error (I do have an index.php file).

Additionallly, for some reason, when I try to click on the "File Manager", I just get
a blank page, like this:

http://2.bp.blogspot.com/_Wfe7dvAMkU8/Ssy-...ile+manager.png

I'm confused, and I don't think I did anything to do this.

*EDIT* Now I can't log in at all to any of my sites- when it says, you have successfuly logged in, it says:

Fatal error: Failed to connect to the DB server in /var/wkscript/db.php on line 29

Any help is appreciated.

I am having the same problem and error message:
Fatal error: Failed to connect to the DB server in /var/wkscript/db.php on line 29

that's odd.....

Now everything is back to normal, they must have fixed whatever went wrong.