SYNC151: Store response malformed
What this means
Your store's reply had stray text in it, which WCPOS tried to clean up.
Check the action you were doing finished — the clean-up does not always work. The stray text usually comes from a plugin or a PHP notice printing extra output into store responses. If this appears often, ask your site admin to check the site's PHP error log for warnings.
Your data
If the action you were doing didn't finish (see Troubleshoot step 1), follow that request's guidance; otherwise no order or product data is affected. If this appears often, ask the person who manages your WordPress site.
Troubleshoot
- Check the action you were doing finished — for example that the sale or change now shows. If it did, nothing more is needed. If it didn't, try it again; if that fails, follow the error it shows or contact support.
- The cause is on the site: a plugin or theme is printing warnings or stray output into REST responses. Ask the site administrator to check the site's logs for PHP notices at the failure time.
- For the site admin: the browser's developer tools (Network tab) — or Advanced → Toggle Developer Tools in the desktop app — show the raw response body; the stray output is visible immediately before or after the JSON.
- For the site admin: the clean-up is best-effort — if this appears often, fix the offending plugin rather than relying on it.