I'm new to this so I'm probably not doing something right, but can't seem to figure out what. I have had success authorizing on site (when I have cell coverage) but have so far been unsuccessful in getting a pre-authorized unlock license to work. When I try beforehand to do the authorizations online at the DJI flysafe website, everything seems to work, I see the license on my DJI Go 4 app, I select the unlocking license and sync, then import to aircraft, then tap aircraft and sync. but When I get to the launch site at the scheduled time, I go into the DJI app, see my pre-authorization shown for the aircraft, but when I try to enable it, I get "User authentication failed (Error code: -13010)". Did I miss something? I tried to follow the instructions to the letter, but they are a wee bit confusing to me. However, after failing to get the pre-authorized license to work, I just tried self-authorizing on-site (had cell coverage) and that worked fine. I'm not getting something. Maybe I'll try again. Grrr. Frustrating. I just want to get the pre-authorization process nailed down so I don't run into any problems on site if I don't have cell coverage.