An existing zap which always used to work normally for us has started to give an error when turning it on. The error says “Zap is incomplete and can't be turned on”.
The zap look complete to me and has worked in this version for a long time.
The only new thing has been that I tried adding a new step in draft and later deleted that step. But never published it.
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Hi
Good question.
You can try reverting to a previous version of the Zap.
https://help.zapier.com/hc/en-us/articles/9693520498445-Create-Zap-versions
Hi I am also having this issue. Seems to be related to a update on Zapier because I have made no changes.
We also have this issue.
No matter how many times we turn it on in “draft” mode,
it doesn’t actually turn on and publish.
It’s related to Facebook Lead Forms
Hi friends
It looks like this is a recent bug with Zapier where Zaps can't be turned on from the Zaps page. This bug should be fixed now.
Hopefully, this helps! 
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