@bprillba Please create a ticket in the repo (including the error and Metabase version).
I'll look at it on the weekend. It may be a quick fix, or maybe something is broken because of the changes in new versions of Metabase.
hey @King_Edward and @Slickrock22
have you guys made any progress since the last post ~2yrs ago? I am running into the same use case, to copy dashboards and charts for different clients.
amazing feature BTW! thank you all for helping the community with that! 
hey @King_Edward and @Slickrock22
Incidentally, I had the same problem.
How to copy the chart model or questions while cloning the dashboard?
Looking forward to your reply, thanks
@lucasmocellin @PatrickY
Metabase has added the dashboard deepcopy functionality in the UI for a while. When you "Duplicate" a dashboard, by default it does deepcopy (if you want a shallow copy, you need to check the box "Only duplicate the dashboard").
@King_Edward I want to copy the model of the chart. Currently copying the dashboard allows you to copy the chart, but you cannot copy the model of the chart.
first, thanks @King_Edward for this awesome resource! Super helpful.
One of the use-cases I have is that I need to be able to create copies of the same dashboard but specifically applying different filters for the card.
So far, I have been able to deep copy (both manually and using the UI). But I have been completely unable to figure out a way to apply a new filter to the cards. Is this something anyone has been able to figure out?
Example of why I have this use-case:
We work with schools and have FERPA restrictions (can't show data for students who are not yours).
Thus, each school gets their own dashboard version. But modifying each question in a dashboard manually takes an absurd amount of time, and there is no way to apply a "universal" filter that applies to everything within a dashboard all at once.
Thanks!
@ksordia I'm happy to hear the package has been helpful.
I don't check here regularly anymore. I suggest creating a discussion in the repo for questions and an issue for feature requests and bug reports.