WLM_ERR_04
What happened
Your WishList Member server rejected the API key that UltraCart sent. The key stored in UltraCart does not match the key on your WishList Member server.
What to do
- Compare the API key you gave UltraCart with the key shown on your WishList Member server, and make sure they match exactly.
The key is the WishList Member Secret Key field on the integration screen:

For setup details, see the WishList Member Integration guide.
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