Things like this can happen from time to time, when the server are doing some scheduled maintenance on the fly. The maintenance is usually during 9am in the morning central european time. However from time to time other things gets done in the database and so on and can cause temporary errors.
For further information I will make another post, if you cant visit your profile it may also be that you have tried to use the spoiler tags in your intro message, this breaks the profile. And if you have done this you need to send a pm to me so that I can revert it, or you do it yourself through the user cp.