Understanding your integration Activity Log (errors explained)

Every Sign Customiser integration keeps an Activity Log of the requests exchanged between Sign Customiser and your store or website — mainly when creating custom sign products and adding them to the cart. This applies to all integrations: the Shopify app and custom, WordPress/WooCommerce, Wix, Squarespace, Webflow, Zapier and custom-API integrations.

When you switch the log to Errors Only, you may see a count such as “3 errors in the last 7 days”. Not every entry means something is broken. Some entries are informational skips that we record for transparency — your customers were not affected and your products were still created. Use this page as a lookup for what each entry means.

Where to find the Activity Log

Shopify: in your Shopify admin, open the Sign Customiser app → open your integration → Activity Logs.
Custom / WordPress / Wix / Squarespace / other (Universal): log in to Sign Customiser → Tools → Integrations → open your integration to see its request logs.

Click View Details on any row to see the request URL, the status code, and the full response.

Harmless — no action needed

“Shopify market publication lookup skipped” (status 424) — Shopify. Your product was created and published to your Online Store normally. We also tried to publish it to a specific Shopify Market, but no market information was supplied, so we simply skipped that optional step. Common if your store doesn’t use Shopify Markets, or on headless/custom storefronts that don’t pass the shopper’s market. This is not the “Missing Permissions” issue — you do not need to accept any permission to clear these. Only act if add to cart fails for shoppers in specific countries (see Why is add to cart not working?).

“Shopify media readiness poll” (status 408) — Shopify. We waited for Shopify to finish processing a product image and the check timed out; it retries automatically. Your product and its image are unaffected.

These informational skips can still appear under “Errors Only”, but they are safe to ignore.

Needs action — permissions & authentication

Missing Permissions (status 401 or 403) — Shopify. A required permission hasn’t been accepted, so your customisers show an error. Open the Sign Customiser app in your Shopify admin and accept the new permission when prompted. Full steps: Missing Permissions.

Unauthorised (status 401 or 403) — custom / Universal. The API key or request signature your integration uses is missing, wrong or expired. Recheck or regenerate your credentials. See Custom API Integration.

Needs action — limits & validation

Too many variants (status 422 or 429) — Shopify. Stores not on Shopify Plus can add up to about 1,000 new variants per day. When that limit is reached, new custom products cannot be created until it resets. See Why is add to cart not working?

“Out of stock” / location fulfilment (status 422) — Shopify. Your default location needs fulfilment enabled and shipping zones configured, otherwise adding a custom product to the cart can fail. See the location and shipping steps in Why is add to cart not working?

Unprocessable / validation (status 422) — custom / Universal. Your endpoint rejected the product payload — usually a required field or format your platform expects. Open View Details to read the exact validation message returned by your site.

Rate limited (status 429). Too many requests were made in a short time (by Shopify’s API or your server). This usually clears on the next attempt.

Needs action — server & connection errors

Server error (status 500–599). Shopify or your own server returned an error while we were creating the product or adding to cart. For custom integrations, open View Details and check your server logs for the exact message.

Connection failed or timeout. We could not reach your endpoint. Check that the URL is correct and reachable and that your server responds promptly. See Custom API Integration.

How to read the status code

2xx — success.
408 / 424 — an informational timeout or optional skip that we handle for you (harmless).
4xx (400, 401, 403, 404, 422, 429) — a request, permission or configuration issue, usually fixable on your side.
5xx — a server error, either on Shopify’s side or on your own server.

Still not sure?

Open View Details on the entry, copy the description and the status code, and send them to us in the chat. Our assistant can read your logs directly and pinpoint the exact cause. Please don’t rely on the error count alone — the details tell the real story.