@xariet - Two potential ideas:
First, just to confirm, did you actually click "run" and get an error message in the Workflow Message Log? Or are you seeing this error message in the Canvas after you have responded to the Macro's configuration questions? Sometimes I've seen some odd caching behavior where Alteryx displays the error message, but it goes away after you run the workflow.
Second, I see an asterick on the Macro's Tab Name indicating there are unsaved changes. Have you saved the macro recently? If not, you may want to save, and see if that resolves the error on the standard workflow.