Use Workflows → Monitor to follow workflow runs after a trigger starts them. A run is one execution of a saved workflow version; each step records its own status and outcome inside that run.
Start with the failing step
Open the run, find the first failed step, and inspect the error before retrying or changing the workflow. Saving builder changes and activating a workflow are separate actions, so confirm which saved version is active before testing again.
For the current run and retry reference, see Workflows. If you have not produced a run yet, follow Build your first workflow.