Our publishing step must have failed. I'll look into it. Thanks for reporting!
@passy indeed https://circleci.com/gh/facebook/flipper/370
* What went wrong:
Execution failed for task ':bintrayPublish'.
> java.lang.NullPointerException (no error message)
WHY THANKS GRADLE!

I manually published a new artifact. I hope that solves it for you, @bojankoma!
Indeed it does help, thanks for looking into it.
I can confirm it's resolved now.
Most helpful comment
WHY THANKS GRADLE!
I manually published a new artifact. I hope that solves it for you, @bojankoma!