I just uploaded to aircraft the latest firmware. Took perfectly. Then upgraded the RC and it comes back stating that it is the latest. But when I attempt to fly, it comes back with an ERROR. It won't start or anything. I don't know what I am doing wrong. But the whole thing is useless to me. Stuck right now. Any ideas???  Thanks

I had a similar problem during the latest upgrade where the Phantom and the controller lost the link and I couldn't not get it reestablished .  I noticed the following in the Release Notes "Both the aircraft and remote controller must be upgraded or else they will not link".  I reran the upgrade on the Phantom and that cleared it up.

Make sure you have the following versions installed:
All-in-One firmware version updated to： v1.8.80
DJI GO app Android version updated to: v2.7.2