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java.lang.NullPointerException: Attempt to invoke virtual method 'int androidx.work.ListenableWorker$Result.ordinal()' on a null object reference
        at androidx.work.impl.WorkerWrapper.handleResult(WorkerWrapper.java:378)
        at androidx.work.impl.WorkerWrapper.onWorkFinished(WorkerWrapper.java:276)
        at androidx.work.impl.WorkerWrapper$2.run(WorkerWrapper.java:251)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
        at java.lang.Thread.run(Thread.java:764)

Can you send us a code sample which reproduces the problem ?
The only obvious this could happen looking at our code, is if your Worker returned a `null` result. I am trying to understand if there is a chance that might happen inside from your Worker.

Handled in https://android-review.googlesource.com/c/platform/frameworks/support/+/839439; but please note the actual problem is that your code is returning null for a value that is annotated as @NonNull, so we will mark your work as failed in this situation.  You should fix your code.