FEDDIT.ONLINE, unlike it's name, is no longer ONLINE.
It may come back some day when KBIN is, at least, in beta.
When it does, if it does, it may come back as a fresh instance requiring re-registration as I expect that the database will no longer be compatible with the newer versions.
It is currently unmaintainable. To upgrade would require a complete rebuilding of the server, and it's not in a state where this can be built in a way that will be stable and upgradable.
For all those who used the server, I thank you, and I'm sorry this had to be shut down.