Declined to help.
WHY IT HAPPENS
Some requests resemble ones that could cause harm, even when yours does not.
The judgement is applied broadly and catches legitimate requests.
WHAT TO TRY
Explain the context and purpose Rephrase more specifically Break the request into parts
WHY CONTEXT HELPS
"How do I test whether my own site is vulnerable to this" is different from the same question with no context.
WHAT NOT TO DO
Try to work around it. That is unproductive and generally against the terms of use.
IF THE REQUEST IS GENUINELY LEGITIMATE AND STILL REFUSED
Open a ticket describing what you were trying to do.
IF IT PARTLY REFUSED
It may have answered the safe part. Read what it did give you.
FOR SENSITIVE SUBJECTS
It may be cautious where you wanted directness.
Explaining your professional context frequently resolves it.