Avoid binding keys to the apostrophe key ( or: ' ), I've had problems with that messing up the tilde / grave key ( ~ / ` ) opening up the console in the past, also causing the apostrophe key causing it to open up when pressed.
If you can't find any key-binds set to apostrophe, try setting all key-binds to default to see if that helps.
If nothing else helps, restart Blockland, press the tilde / grave key a couple of times, and then post a console.log so we can see if we can spot the problem.