AUTH311: Rest route missing
What this means
The WCPOS store route is unavailable.
Ask the site administrator to check whether a security or proxy plugin is stripping WCPOS request headers.
Your data
No order or product data is affected. If this persists, ask the person who manages your WordPress site.
Troubleshoot
At the till — for the cashier: test both supported REST forms in a browser — your store's /wp-json/ address and /index.php?rest_route=/. Only diagnose a REST block if neither returns JSON; then report that to your administrator.
On the store — for the site administrator:
- Confirm WCPOS is active: WP Admin → Plugins.
- If neither REST form works, check whether a security plugin, proxy or CDN is stripping WCPOS request headers or blocking REST requests — firewall rules and disable-REST-API hardening options are the usual culprits.
- On some hosts, re-saving permalinks (Settings → Permalinks → Save) restores missing REST routes.