This is an easy but somewhat urgent fix.
Calling bot.roomRegister does not set the bot's roomId. This causes problems if, for example, you need to call bot.roomInfo later. The bot sends a null, and gets an error code in return from Turntable.
I discovered this issue by calling the bot constructor without a room ID, then calling roomRegister thinking it would handle this for me. Luckily, bot.roomId is publically available to change, so I have a temporary fix by inserting this line
before the call to roomRegister