Wrangler button doesn’t work with imported pipelines
Problem
Due to a bug, if you export a pipeline that includes a Wrangler transformation and then import it into another instance, when you open the Wrangler transformation and click the Wrangle button, the following error message displays: "Unable to load data".
Solution(s)
Copy the directives from existing Wrangler transformation.
Add a new Wrangler transformation to the pipeline.
Open the new Wrangler transformation and click the Wrangle button.
Choose the same dataset again.
The dataset displays in the Wrangler workspace mode.In the terminal at the bottom of the workspace, paste the copied directives from the old Wrangler transformation.
To recreate the exact Wrangler transformation, click Apply.
Reconnect the pipeline to use the new wrangler and delete the old Wrangler transformation.