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What does error code 16666100 mean?

Error 16666100 is TikTok blocking the product from being added to your showcase, usually because the product is unavailable, you're on a Seller account, your Shop permissions changed, or your showcase is full.

Written by Basel from Soco

The error is TikTok's, not Soco's: TikTok is refusing to add the product to your showcase, and there are four usual reasons.

The four usual causes, each with its check

Work down the list and fix the one that matches:

  1. The product is no longer available. Out of stock, removed by the seller, or deactivated on TikTok Shop; TikTok then blocks adding it. Check the product is still active on TikTok Shop.

  2. You're on a Seller account. Affiliate products can only be added on a Personal (Creator) account: a Seller or Official Shop account can only promote its own shop's products and has no access to the affiliate Product Marketplace. Check which account type you're on.

  3. Your TikTok Shop permissions changed. A restriction, warning or temporary access removal on TikTok's side blocks adding until it's resolved. Check your TikTok Shop Creator Center for warnings or account notices.

  4. Your showcase is full. TikTok limits a showcase to about 2,000 products. If you're near the limit, remove products you no longer promote and try again.

Still blocked?

Message us in the app chat with the product ID and a screen recording of the add failing in Soco, and we'll dig into it directly.

Next steps

The showcase mechanics around this error:

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