Troubleshooting
HTML response instead of JSON
Section titled “HTML response instead of JSON”Usually means the request hit a wrong path, lost the ApiKey, or reached a generic error page:
- Verify Named Credential URL and External Service path don’t duplicate segments
- Confirm ApiKey header is sent on the callout
- Check Remote Site Settings / CSP if applicable in your org
Duplicate URL in callout
Section titled “Duplicate URL in callout”If the full URL appears twice (e.g. https://host/https://host/...), remove the host from either the Named Credential merge field or the External Service relative path—keep it in one place only.
Unexpected empty properties
Section titled “Unexpected empty properties”- Confirm lat/long are decimal degrees in the expected order
- Verify the service name matches your licensed layer exactly
- Test coordinates known to fall inside the layer
Cache behavior
Section titled “Cache behavior”Responses may include a cache hint (fromcache or similar). Cached answers are normal for repeated lookups; clear or wait for TTL when testing configuration changes.
Flow mapping surprises
Section titled “Flow mapping surprises”Generated External Service types may expose optional fields with companion _set flags. Map the fields your Flow actually uses; ignore unused optional groups.
Still stuck? Contact support.