I was having a strange error with my DJI Air3s drone, it was reporting that I wasn’t connected. Then after I try to connect typing my email (and confirming the agree checkbox) it was reporting “Check network” error.

And it no matter which WiFi network or hotspot I use, it always was reporting this error. Strangely if I click in the Update firmware message the remote controller was able to download and update the firmware without issue.

Some after testing I discovered that doing a Factory Reset of the RC2 was enough to fix the issue.

Settings -> System -> Factory Reset