SYNC121: Sync unreachable
What this means
Your store cannot be reached right now, so changes will stay on this device.
Check the connection and keep working offline; syncing will retry automatically when the store is reachable.
Your data
The change is saved on this device but has not reached your store.
Troubleshoot
- Keep selling — sales are saved on this device and sync resumes automatically once the store answers.
- Check whether the till itself is online: can any other website load from this device?
- Open your store's own website in a browser tab on the same device; if it does not load there either, the site or its hosting is down, not the POS.
- For whoever manages this device's network: if the site loads but the POS stays offline, something between the two is blocking API requests — a VPN, firewall, ad-blocker or security plugin. The browser's developer tools (Network tab) — or Advanced → Toggle Developer Tools in the desktop app — show which request fails.