So I tried to fly my drone yesterday and haven't been able to take off yet. Keeps saying I'm in a NoFly zone.  I'm not. Not even close. So I'm stuck.

Are you using the latest DJI app and is the MP and RC up to date?

Hi, please try steps below:
1. Power on the RC, drone, ensure the linking between the RC and drone, keep the drone in a place with fine GPS signal;
2. Make sure that the app is not running in the background; if it is running, please shut it down and close the app;
3. Keep the internet opened and is available to DJI GO 4, then launch the app.
Then it will work.
Let me know if it doesn't help. A screenshot of the error message will make a great help.