Ouch. Search around in here, there's more info on that error.
Also, can you hit that repository using a web browser? I get a 404 error when trying it in mine, but removing the "bora" from the URL pops up the sitej ust fine.
I just refreshed mine with no problems.
Mine only has the following:

Catalog Name: Nokia Catalog
Web address: http://catalogue.tableteer.nokia.com/certified/
Distribution: bora
Components: user

If yours differs from the above, I would reflash the tablet with the latest firmware.