I got that message on Campbx, too. If you try to login or reload a page a few times after getting that error, the page seems to load. It literally would take 3-4 reloads until the page came up rather than giving me the error. I liked Campbx so far, but I moved most of my btc out of it for now until this issue is resolved. Transferring took 3-4 tries as well.
Edit: It now seems that there is a message saying the site will be back up in 15 minutes.
After reading this forum For a few months now (but never really posting), I'm sticking almost solely to BTC. I might buy few ltc and then see how things go. However, if you have a decent amount of fiat to put in, going in the 5-10% range for ltc could be a good idea.
I'd recommend checking out the topics on litecoin in the alternate cryptos section.
I think it is good idea to have more then 4 post. It makes you to read content (4 h) and it you can found something really interesting it will hold you here more time.
The entire Speculation section is quite addictive/interesting.