# MT5 troubleshooting > The failures that actually happen\, and what each one means\. *Guides → MetaTrader 5* | Symptom | Most likely cause | Action | | --- | --- | --- | | Expert not in Navigator | File placed in the wrong folder\, or terminal not restarted | Re\-open the data folder and restart MetaTrader 5 | | Authorisation refused | Account\, server or device does not match the binding | Compare the values in Account → MT5 accounts | | Request blocked | WebRequest permission missing | Add the endpoint under Tools → Options → Expert Advisors | | Intermittent disconnects | IP changed\, or a VPN is rotating exits | Use a stable connection\, then re\-check the License | | Works on one machine only | Device limit reached | Review device slots in Account → Licenses | | Analysis unavailable | Service degraded upstream | Retry later\; nothing is executed on a stale result | > **BEFORE OPENING A TICKET** — Have your order reference and the exact message from the Experts tab\. Never paste your License secret\, password or MFA code into a ticket\.