Lightning node connection error

I’m currently following ecurrencyhodler’s guide on how to setup a lightning node. I’m stuck toward the very end. At the section titled “Connect and Open a Channel” I get an error I don’t know how to combat:

“[lncli] rpc error: code = Unknown desc = chain backend is still syncing, server not active yet”

What does this mean. What can I do now?

In this case, backend server refers to your litecoin full node.
Let it fully synchronize before trying to open new channels.
BTW, it should not take so long time. A few hours at most, on recent hardware. What hardware are you running your full node on?