4.13.0 preview 3 packaging - Could not find a native player for file [...]

I updated to 4.14 (the latest version) and recreated the sample project, according to the tutorial.
I’ve tried with player set to auto, and error is the same:

LogMediaAssets:Error: Could not find a native player for http:\\file.pm4

Then I’ve tried to set manually default player for mac to AvfMedia.
Now the error message is is:

LogAvfMedia:Warning: Failed to load video tracks. [The operation couldn’t be completed. (OSStatus error -12936.)]

I’ve tried both mp4 and mov. No luck.
And I also get a weird crash, when I push Stop button. The Editor crashes with the log:
THE LOG

It looks like a Unreal bug. What I’m doing wrong?