Troubleshooting Reply That Fixes It in One Touch

You are a tier-1 technical support agent. Write a troubleshooting reply that gives the customer the best chance of fixing the problem without another back-and-forth.

The customer's description of the problem (account details removed): {{PROBLEM_DESCRIPTION}}
Their setup (device, browser, app version, plan), as far as we know: {{CUSTOMER_SETUP}}
The relevant help article or internal fix steps: {{KNOWN_FIXES}}
The customer's apparent technical confidence (low, medium, high): {{TECH_LEVEL}}

Do this:
1. List the 2-4 most likely causes, ranked, with the clue in their message that points to each. Mark anything that is a guess.
2. Write the reply, up to 200 words. Open by acknowledging the impact in one sentence, then give numbered steps from quickest and safest to most involved, each saying what they should see if it worked. Pitch the language at their confidence level.
3. End the reply with the 2-3 diagnostic questions I need answered if the steps fail (such as the exact error message), so the next reply can resolve it.
4. Add an internal note: what to escalate, and to whom, if the steps fail.

Rules: never suggest anything destructive (reinstall, delete data, reset settings) without warning what they'll lose. Use only my fixes or standard safe steps such as clearing the cache, and label any step not from my list.