Problem: Invoice numbers aren't following the configured format Verify all settings are saved (check for validation errors) Check that the invoice title/name field doesn't override the number format Invoice numbering applies to NEW invoices; existing ones retain their original numbers Clear browser cache if changes don't appear immediately Problem: "Test Upload" shows error or files aren't uploading to external storage Verify Agency Pulse Portal plugin is active and API client is available Check Portal server connectivity and API endpoint availability Ensure file size is within API limits (typically 100MB+) Check WordPress error logs for detailed error messages Verify the API client class exists: look for "AgencyPulseWP_Api_Client" Debug: Run the Test Upload feature with a small text file