Sorry, An error has occurred on the server

Hi everyone, in the last 30 minutes I tried several times to login to NOF site and I receive the following message:

“Sorry, An error has occurred on the server.
Please, try your request again later.

An error has occurred with our service, your data is safe, but for your protection and to prevent any possible loss of data your request was halted. The error has been logged and reported and we will look into it shortly.

Please return to the home page and log in again. If the problem persists, contact us for assistance.”

What happened? My childrens are safe in internet?

Thanks in advance for replies.