Unknown packaging error

Development Platform & Builds
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1

A long time ago I used to package stuff without error, but now this happens all the time:
“PackagingResults:Error: Error Unknown Error”

I tried to move all the content into new empty project, but still get error, but after longer span of time.
I’m really stuck, any tips?
link text

2

Nevermind, some broken assets were hidden in editor, after deleting them in file browser, project packaged successfully