It’s hard to diagnose at a distance just like that so I have to ask you a couple of questions first.
Are you running Raspbian for Robots?
This command you put in your message shouldn’t work. Did you get any error message after this one?
Try cd /home/pi/Desktop/GrovePi/Projects/Home_Weather_Display instead
Great to see it’s now working! And thanks for pointing out the error in the tutorial. I have fixed it now (slightly differently than what’s in here, but they mean the same thing)