If the tutorial has no recovery path for common failures, start by preserving one representative example. It gives the investigation a concrete reference and makes the eventual correction easier to judge.
Find the likely cause
Only the ideal sequence was documented.
Treat this as an explanation to verify against the actual work. Look at the input, the relevant decision, and the final result together. If the evidence does not support this diagnosis, investigate the mismatch before applying a convenient but unrelated fix.
Make the targeted correction
Add likely failure symptoms and bounded recovery steps.
A tutorial succeeds when a reader with the stated prerequisites can reproduce the intended result and recover from common mistakes.
Check that the repair worked
Test at least the most common error condition before publication.
Repeat the check on the final version that the reader or customer will encounter. An approved draft, a preview, and a published result can differ; the acceptance decision should concern the version people actually use.
Prevent the next related failure
A separate issue to watch for is this: aI tutorials skip prerequisites. List required access, files, settings, and prior steps.
Monitor the useful outcome
Measure successful task completion and the steps that require clarification or support.
Keep a short record of the original symptom, the evidence behind the diagnosis, and the result of the acceptance check. That record makes the solution reusable when the same condition appears again, without assuming that every superficially similar problem has the same cause.