This "Ouch" message occurs for a couple of reason.
One you may have attempted to access something that was currently being worked on by one of the programmers. In this case, it is a temporary event and you can try again, though you may need to clear your temporary internet files.
The second reason is that you may have stumbled onto a glitch in the system. While we do try to minimize the amount of glitches that occur, they will happen from time to time. It is challenging for programmers to make changes to a "live" system and have everything work right out of the gate.
If you come across one of these, please feel free to report it to firstname.lastname@example.org. Be sure to describe exactly what or where you were going when the "Ouch" occurred. This will help us track down the issue quicker.