Hi.

It's not a big problem, but I'll report it just in case.
The debugger catches an error like the following when launching software created with the SDK( iOS Mobile SDK v4.12 ).
Once you get into this state, you will not be able to start without clearing the SDK_logs.

-- error message
File to write: /var/mobile/Containers/Data/Application/FDA20400-DD20-4381-B28F-4A19CF820298/Documents/SDK_logs/FlightRecord/DJIFlightRecord_2020-05-14_[12-50-54].txt
Assertion failed: (false && "can't find aes cipher idx"), function AESEncryptionData, file /Users/afstand.ren/DJIDev/dji-flightrecordengine/source/Writer/encryption/flight_record_encryption_layer.cpp, line 171.

What you mean "start"? Is it fail to connect the drone or control?

I can't explain it exactly because of the asynchronous processing, but I think this call is the trigger.

[DJISDKManager registerAppWithDelegate:xxxxx];

https://github.com/dji-sdk/Mobile-SDK-iOS
Can you reproduce this issue again with the DJI official sample? I work when I tested.

Both the official sample and my application are usually fine, but when the problem happened, it was in a special environment like the one below.
1. Unable to connect to the Internet
2. Debugger is connected remotely.

(I don't understand what the trigger is.)

When a problem occurs, I don't care about it too much because it works without a problem for a while by deleting the log folder in iPhone.