I'd also suggest checking your internet connection and make sure it's a strong connection. If you have a weak connection, it may not work.
Additionally, if you have multiple accounts and they are in different houses, make sure you're not in the house chat for either of them! When you're in the house chat for one and log into the other one, the chat won't load correctly.
Bugs
Try restarting your Chromebook and try again. Also try not using incognito tab if you do.
Extensions or apps could also be the cause of crashes, and you can try to remove them to resolve some issues as well.
That is true. Chromebooks aren't the best for gaming or whatnot.
I'd also suggest checking your internet connection and make sure it's a strong connection. If you have a weak connection, it may not work.
Additionally, if you have multiple accounts and they are in different houses, make sure you're not in the house chat for either of them! When you're in the house chat for one and log into the other one, the chat won't load correctly.