I'm not sure if this is a class specific thing or not, but I went into the other dungeon which has a lock and I completed that. So it's not anything involving my computer.
Yes, the game said my computer's graphics card is outdated, however, it runs perfectly fine for me up until this point.
Please Blizzard reply as soon as possible, I'd really appreciate if I could work on my barbarian some more.
If anyone replies to this, thank you.