java.lang.NullPointerException: Attempt to invoke virtual method 'void com.tablemi.flutter_bluetooth_basic.DeviceConnFactoryManager.sendDataImmediately(java.util.Vector)' on a null object reference

[apocalipse9]

Hi Folks, good day.
I'm getting this messages on crashlytics and can't reproduce this problem.
Does anyone have any idea what might be causing this problem? In my tests it runs perfectly, but some users are having this problem.

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.tablemi.flutter_bluetooth_basic.DeviceConnFactoryManager.sendDataImmediately(java.util.Vector)' on a null object reference
at com.tablemi.flutter_bluetooth_basic.FlutterBluetoothBasicPlugin$4.run(:62)
at com.tablemi.flutter_bluetooth_basic.ThreadPool$1.run(:2)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:923)

[ebrahimmansur]

same here ,,,,have you found a solution