Can't Unlock Geo Zone: Server Error (Gnoss Field)

[Dark Boomer]

I can't unlock a Geo Zone (autorization zone) with my Mini 3 Pro. I keep getting a message like: Server error, try again in a few minutes (or something like that, don't remember the exact words). The Geo Zone is Gnoss Airfield in Novato, Marin County, CA. As far as I can tell, it is an "instant" unlock Geo Zone, meaning you can't unlock in advance, you have to unlock when you are in the area ready to fly. I set up my cellphone as a hotspot, but kept getting the server error. I only had 4G (not even 5G) connection, and even though I could still connect the controller to my phone, and my phone to the internet, I still kept getting the dji server error message.. My co-worker was there and I tried to use his phone as a hot spot, (he uses a different cell network), but even after using his phone as a hotspot, I still kept getting the servier error. Any advice is welcomed.