TikTok catalogs reject the same blank fields as Google.

Missing id, title, price, or image_link, plus duplicate ids. If your TikTok catalog export uses those column names, the Merchant Center checker reads it in this tab. The file is not uploaded.

Open the feed check

How

1. TikTok Seller Center / Ads Manager → catalog → export the product file (TSV or CSV with id, title, price, image_link).
2. Drop it on gmc-check.html. Nothing leaves the browser.
3. Fix the rows that cannot advertise. A ranked Monday list of 20 is the Store Audit (USD $149) — email the same file to info@shopgaps.com.

ShopGaps is not a TikTok app and does not log into Seller Center. Facebook catalogs: facebook.html. WooCommerce merchants who want an on-site plugin can use Catalog Audit.