Github user necosta commented on the issue:
https://github.com/apache/zeppelin/pull/2420
Yes, @1ambda,
The issue is on notebooks that contain "z.input("
On commit 7b585c7399f29, z.input was renamed to z.textbox, but loading old
notebooks into 0.8 was not handled.
The bug is on Note.java, addCloneParagraph, where we import forms without
checking.
We are working on a fix that will be made available in a new pull request
FYI: @andreaTP
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