| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | "Invalid License Key" | Typo or wrong product | Double-check the key. Ensure you didn't buy a key for "GameHost Legacy " if using v4. | | "Server Not Reachable" | Firewall blocking port 443 | Allow license.gamehostapp.com outbound. Also check proxy settings. | | "License Expired" | Subscription lapsed | Renew your subscription via the vendor portal. | | "Domain Mismatch" | Key bound to server1.com but using test.com | Re-issue the license from your customer dashboard, or use the original domain. | | "Too Many Activations" | Key used on 3 PCs but limit is 2 | Deactivate an old server via the web portal, then retry. |
: If the software was bought via Steam, right-click the item in your Library, select Merchant Account : For direct hosting purchases (like EUGameHost GameHosting.co ), keys are usually stored in your client area under "My Services" "License Management" Email Confirmation gamehost license key