Hi @natarend,
For future reference, this post would be much better suited to the Designer discussions boards rather than analytics hub (Alteryx's next gen server product). Hopefully @KylieF can move it so it gets more visibility.
I haven't seen this error before, so can't help from just the screenshot, but might be able to try to assist if you are able to share the macro and workflow, so I can try to debug?
Thanks,
Joe