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IOS: Unhandled Exception: Exception: Failed to write the characteristic

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didWriteValueForCharacteristic [VERBOSE-2:ui_dart_state.cc(199)] Unhandled Exception: Exception: Failed to write the characteristic #0 BluetoothCharacteristic.write. (package:flutter_blue/src/bluetooth_characteristic.dart:139:15) #1 _rootRunUnary (dart:async/zone.dart:1362:47) #2 _CustomZone.runUnary (dart:async/zone.dart:1265:19) didUpdateNotificationStateForCharacteristic Android is OK